HTML CodeSniffer Rules

Whymarrh Whitby edited this page Apr 8, 2015 · 6 revisions
Clone this wiki locally

Below is a full list of all of the rules which pa11y uses in testing. To ignore a particular rule you'll want to copy the full rule name from the results list. In places, the name of an element or variable part of the rule is wrapped in brackets.

More information on these rules can be found on the HTML CodeSniffer site: WCAG2, Section508.

Section508

  • Section508.A.Audio
    For multimedia containing audio only, ensure an alternative is available, such as a full text transcript.

  • Section508.A.Img.EmptyAltInLink
    Img element is the only content of the link, but is missing alt text. The alt text should describe the purpose of the link.

  • Section508.A.Img.NullAltWithTitle
    Img element with empty alt text must have absent or empty title attribute.

  • Section508.A.Img.Ignored
    Img element is marked so that it is ignored by Assistive Technology.

  • Section508.A.Img.MissingAlt
    Img element missing an alt attribute. Use the alt attribute to specify a short text alternative.

  • Section508.A.Img.GeneralAlt
    Ensure that the img element's alt text serves the same purpose and presents the same information as the image.

  • Section508.A.InputImage.MissingAlt
    Image submit button missing an alt attribute. Specify a text alternative that describes the button's function, using the alt attribute.

  • Section508.A.InputImage.GeneralAlt
    Ensure that the image submit button's alt text identifies the purpose of the button.

  • Section508.A.Area.MissingAlt
    Area element in an image map missing an alt attribute. Each area element must have a text alternative that describes the function of the image map area.

  • Section508.A.Area.GeneralAlt
    Ensure that the area element's text alternative serves the same purpose as the part of image map image it references.

  • Section508.A.Object.MissingBody
    Object elements must contain a text alternative after all other alternatives are exhausted.

  • Section508.A.Object.GeneralAlt
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • Section508.A.Applet.MissingBody
    Applet elements must contain a text alternative in the element's body, for browsers without support for the applet element.

  • Section508.A.Applet.MissingAlt
    Applet elements must contain an alt attribute, to provide a text alternative to browsers supporting the element but are unable to load the applet.

  • Section508.A.Applet.GeneralAlt
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • Section508.B.Video
    For multimedia containing video, ensure a synchronised audio description or text alternative for the video portion is provided.

  • Section508.B.Captions
    For multimedia containing synchronised audio and video, ensure synchronised captions are provided for the audio portion.

  • Section508.C.Colour
    Ensure that any information conveyed using colour alone is also available without colour, such as through context or markup.

  • Section508.D.Linearised
    Ensure that content is ordered in a meaningful sequence when linearised, such as when style sheets are disabled.

  • Section508.D.HiddenText
    If content is hidden and made visible using scripting (such as "click to expand" sections), ensure this content is readable when scripts and style sheets are disabled.

  • Section508.D.[msgCode]
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • Section508.D.HeadingOrder
    The heading structure is not logically nested. This [Node name, eg. h2] element appears to be the primary document heading, so should be an h1 element.

  • Section508.D.HeadingOrder
    The heading structure is not logically nested. This [Node name, eg. h4] element should be an [Expected heading node name, eg. h2] to be properly nested.

  • Section508.G.TableHeaders
    This table has no headers. If this is a data table, ensure row and column headers are identified using th elements.

  • Section508.H.IncorrectHeadersAttr
    Incorrect headers attribute on this td element. Expected "[Expected list of IDs]" but found "[Actual list of IDs]".

  • Section508.H.MissingHeadersAttrs
    The relationship between td elements and their associated th elements is not defined. As this table has multiple levels of th elements, you must use the headers attribute on td elements.

  • Section508.H.MissingHeaderIds
    Not all th elements in this table contain an id attribute. These cells should contain ids so that they may be referenced by td elements headers attributes.'

  • Section508.H.IncompleteHeadersAttrs
    Not all td elements in this table contain a headers attribute. Each headers attribute should list the ids of all th elements associated with that cell.

  • Section508.I.Frames
    This [Node Name] element is missing title text. Frames should be titled with text that facilitates frame identification and navigation.

  • Section508.J.Flicker
    Check that no component of the content flickers at a rate of greater than 2 and less than 55 times per second.

  • Section508.K.AltVersion
    If this page cannot be made compliant, a text-only page with equivalent information or functionality should be provided. The alternative page needs to be updated in line with this page's content.

  • Section508.L.EmptyAnchorNoId
    Anchor element found with no link content and no name and/or ID attribute.

  • Section508.L.PlaceholderAnchor
    Anchor element found with link content, but no href, ID or name attribute has been supplied.

  • Section508.L.NoContentAnchor
    Anchor element found with a valid href attribute, but no link content has been supplied.

  • Section508.L.DblClick
    Ensure the functionality provided by double-clicking on this element is available through the keyboard.

  • Section508.L.MouseOver
    Ensure the functionality provided by mousing over this element is available through the keyboard; for instance, using the focus event.

  • Section508.L.MouseOut
    Ensure the functionality provided by mousing out of this element is available through the keyboard; for instance, using the blur event.

  • Section508.L.MouseMove
    Ensure the functionality provided by moving the mouse on this element is available through the keyboard.

  • Section508.L.MouseDown
    Ensure the functionality provided by mousing down on this element is available through the keyboard; for instance, using the keydown event.

  • Section508.L.MouseUp
    Ensure the functionality provided by mousing up on this element is available through the keyboard; for instance, using the keyup event.

  • Section508.M.PluginLink
    If external media requires a plugin or application to view, ensure a link is provided to a plugin or application that complies with Section 508 accessibility requirements for applications.

  • Section508.N.Errors
    If an input error is automatically detected in this form, check that the item(s) in error are identified and the error(s) are described to the user in text.

  • Section508.N.Labels
    Check that descriptive labels or instructions (including for required fields) are provided for user input in this form.

  • Section508.N.KeyboardNav
    Ensure that this form can be navigated using the keyboard and other accessibility tools.

  • Section508.O.SkipLinks
    Ensure that any common navigation elements can be bypassed; for instance, by use of skip links, header elements, or ARIA landmark roles.

  • Section508.O.NoSuchID
    This link points to a named anchor [ID] within the document, but no anchor exists with that name.

  • Section508.O.NoSuchIDFragment
    This link points to a named anchor [ID] within the document, but no anchor exists with that name in the fragment tested.

  • Section508.P.TimeLimit
    If a timed response is required on this page, alert the user and provide sufficient time to allow them to indicate that more time is required.

  • Section508.P.MetaRedirect
    Meta refresh tag used to redirect to another page, with a time limit that is not zero. Users cannot control this time limit.

  • Section508.P.MetaRefresh
    Meta refresh tag used to refresh the current page. Users cannot control the time limit for this refresh.

WCAG2A

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H30.2
    Img element is the only content of the link, but is missing alt text. The alt text should describe the purpose of the link.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H37
    Img element missing an alt attribute. Use the alt attribute to specify a short text alternative.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H67.1
    Img element with empty alt text must have absent or empty title attribute.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H67.2
    Img element is marked so that it is ignored by Assistive Technology.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.G94.Image
    Ensure that the img element's alt text serves the same purpose and presents the same information as the image.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H36
    Image submit button missing an alt attribute. Specify a text alternative that describes the button's function, using the alt attribute

  • WCAG2A.Principle1.Guideline1_1.1_1_1.G94.Button
    Ensure that the image submit button's alt text identifies the purpose of the button.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H24
    Area element in an image map missing an alt attribute. Each area element must have a text alternative that describes the function of the image map area.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H24.2
    Ensure that the area element's text alternative serves the same purpose as the part of image map image it references.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.G73,G74
    If this image cannot be fully described in a short text alternative, ensure a long text alternative is also available, such as in the body text or through a link.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H2.EG5
    Img element inside a link must not use alt text that duplicates the text content of the link.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H2.EG4
    Img element inside a link has empty or missing alt text when a link beside it contains link text. Consider combining the links.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H2.EG3
    Img element inside a link must not use alt text that duplicates the content of a text link beside it.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H53
    Object elements must contain a text alternative after all other alternatives are exhausted.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.G94,G92.Object
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H35.3
    Applet elements must contain a text alternative in the element's body, for browsers without support for the applet element.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.H35.2
    Applet elements must contain an alt attribute, to provide a text alternative to browsers supporting the element but are unable to load the applet.

  • WCAG2A.Principle1.Guideline1_1.1_1_1.G94,G92.Applet
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2A.Principle1.Guideline1_2.1_2_1.G158
    If this embedded object contains pre-recorded audio only, and is not provided as an alternative for text content, check that an alternative text version is available.

  • WCAG2A.Principle1.Guideline1_2.1_2_1.G159,G166
    If this embedded object contains pre-recorded video only, and is not provided as an alternative for text content, check that an alternative text version is available, or an audio track is provided that presents equivalent information.

  • WCAG2A.Principle1.Guideline1_2.1_2_2.G87,G93
    If this embedded object contains pre-recorded synchronised media and is not provided as an alternative for text content, check that captions are provided for audio content.

  • WCAG2A.Principle1.Guideline1_2.1_2_3.G69,G78,G173,G8
    If this embedded object contains pre-recorded synchronised media and is not provided as an alternative for text content, check that an audio description of its video, and/or an alternative text version of the content is provided.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H42.2
    Heading tag found with no content. Text that is not intended as a heading should not be marked up with heading tags.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H93
    Multiple labels exist with the same "for" attribute. If these labels refer to different form controls, the controls should have unique "id" attributes.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NonExistent
    This label's "for" attribute contains an ID that does not exist in the document.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NonExistentFragment
    This label's "for" attribute contains an ID that does not exist in the document fragment.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NotFormControl
    This label's "for" attribute contains an ID that points to an element that is not a form control.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NoForAttr
    Label found without a "for" attribute, and therefore not explicitly associated with a form control.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NoId
    Form control does not have an ID, therefore it cannot have an explicit label.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H65.3
    Form control without a label contains an empty title attribute. The title attribute should identify the purpose of the control.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H65
    Check that the title attribute identifies the purpose of the control, and that a label element is not appropriate.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.2
    Form control does not have an explicit label or title attribute, identifying the purpose of the control.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.NoLabelAllowed
    Label element should not be used for this type of form control.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.1.After
    The label element for this control should be placed after this element.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H44.1.Before
    The label element for this control should be placed before this element.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H49.[NodeName]
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H49.AlignAttr
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H42
    Heading markup should be used if this content is intended as a heading.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H63.3
    Table cell has an invalid scope attribute. Valid values are row, col, rowgroup, or colgroup.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H63.2
    Scope attributes on td elements that act as headers for other elements are obsolete in HTML5. Use a th element instead.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43.ScopeAmbiguous
    Scope attributes on th elements are ambiguous in a table with multiple levels of headings. Use the headers attribute on td elements instead.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43.IncorrectAttr
    Incorrect headers attribute on this td element. Expected "[expected headers]" but found "[actual headers]"

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43.HeadersRequired
    The relationship between td elements and their associated th elements is not defined. As this table has multiple levels of th elements, you must use the headers attribute on td elements.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43.MissingHeaderIds
    Not all th elements in this table contain an id attribute. These cells should contain ids so that they may be referenced by td elements headers attributes.'

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43.MissingHeadersAttrs
    Not all td elements in this table contain a headers attribute. Each headers attribute should list the ids of all th elements associated with that cell.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H43,H63
    The relationship between td elements and their associated th elements is not defined. Use either the scope attribute on th elements, or the headers attribute on td elements.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H63.1
    Not all th elements in this table have a scope attribute. These cells should contain a scope attribute to identify their association with td elements.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H39,H73.4
    If this table is a data table, and both a summary attribute and a caption element are present, the summary should not duplicate the caption.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H73.3.Check
    If this table is a data table, check that the summary attribute describes the tables organization or explains how to use the table.'

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H73.3.NoSummary
    If this table is a data table, consider using the summary attribute of the table element to give an overview of this table.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H39.3.Check
    If this table is a data table, check that the caption element accurately describes this table.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H39.3.NoCaption
    If this table is a data table, consider using a caption element to the table element to identify this table.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H71.3
    Fieldset does not contain a legend element. All fieldsets should contain a legend element that describes a description of the field group.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H85.2
    If this selection list contains groups of related options, they should be grouped with optgroup.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H71.2
    Radio buttons or check boxes with the same name attribute must be contained within a fieldset element.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H48.1
    Content appears to have the visual appearance of a bulleted list. It may be appropriate to mark this content up using a ul element.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H48.2
    Content appears to have the visual appearance of a numbered list. It may be appropriate to mark this content up using an ol element.

  • WCAG2A.Principle1.Guideline1_3.1_3_1.G141
    The heading structure is not logically nested. This [heading] element (should be a [correct heading] to be properly nested / appears to be the primary document heading, so should be an h1 element).

  • WCAG2A.Principle1.Guideline1_3.1_3_1.H48
    If this element contains a navigation section, it is recommended that it be marked up as a list.

  • WCAG2A.Principle1.Guideline1_3.1_3_2.G57
    Check that the content is ordered in a meaningful sequence when linearised, such as when style sheets are disabled.

  • WCAG2A.Principle1.Guideline1_3.1_3_3.G96
    Where instructions are provided for understanding the content, do not rely on sensory characteristics alone (such as shape, size or location) to describe objects.

  • WCAG2A.Principle1.Guideline1_4.1_4_1.G14,G182
    Check that any information conveyed using colour alone is also available in text, or through other visual cues.

  • WCAG2A.Principle1.Guideline1_4.1_4_2.F23
    If any audio plays automatically for longer than 3 seconds, check that there is the ability to pause, stop or mute the audio.

  • WCAG2A.Principle1.Guideline1_4.1_4_3.F24.BGColour
    Check that this element has an inherited foreground colour to complement the corresponding inline background colour or image.

  • WCAG2A.Principle1.Guideline1_4.1_4_3.F24.FGColour
    Check that this element has an inherited background colour or image to complement the corresponding inline foreground colour.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.DblClick
    Ensure the functionality provided by double-clicking on this element is available through the keyboard.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.MouseOver
    Ensure the functionality provided by mousing over this element is available through the keyboard; for instance, using the focus event.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.MouseOut
    Ensure the functionality provided by mousing out of this element is available through the keyboard; for instance, using the blur event.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.MouseMove
    Ensure the functionality provided by moving the mouse on this element is available through the keyboard.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.MouseDown
    Ensure the functionality provided by mousing down on this element is available through the keyboard; for instance, using the keydown event.

  • WCAG2A.Principle2.Guideline2_1.2_1_1.SCR20.MouseUp
    Ensure the functionality provided by mousing up on this element is available through the keyboard; for instance, using the keyup event.

  • WCAG2A.Principle2.Guideline2_1.2_1_2.F10
    Check that this applet or plugin provides the ability to move the focus away from itself when using the keyboard.

  • WCAG2A.Principle2.Guideline2_2.2_2_1.F40.2
    Meta refresh tag used to redirect to another page, with a time limit that is not zero. Users cannot control this time limit.

  • WCAG2A.Principle2.Guideline2_2.2_2_1.F41.2
    Meta refresh tag used to refresh the current page. Users cannot control the time limit for this refresh.

  • WCAG2A.Principle2.Guideline2_2.2_2_2.SCR33,SCR22,G187,G152,G186,G191
    If any part of the content moves, scrolls or blinks for more than 5 seconds, or auto-updates, check that there is a mechanism available to pause, stop, or hide the content.

  • WCAG2A.Principle2.Guideline2_2.2_2_2.F4
    Ensure there is a mechanism available to stop this blinking element in less than five seconds.

  • WCAG2A.Principle2.Guideline2_2.2_2_2.F47
    Blink elements cannot satisfy the requirement that blinking information can be stopped within five seconds.

  • WCAG2A.Principle2.Guideline2_3.2_3_1.G19,G176
    Check that no component of the content flashes more than three times in any 1-second period, or that the size of any flashing area is sufficiently small.

  • WCAG2A.Principle2.Guideline2_4.2_4_1.H64.1
    Iframe element requires a non-empty title attribute that identifies the frame.

  • WCAG2A.Principle2.Guideline2_4.2_4_1.H64.2
    Check that the title attribute of this element contains text that identifies the frame.

  • WCAG2A.Principle2.Guideline2_4.2_4_1.G1,G123,G124,H69
    Ensure that any common navigation elements can be bypassed; for instance, by use of skip links, header elements, or ARIA landmark roles.

  • WCAG2A.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchId
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name.

  • WCAG2A.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchIdFragment2.4.2
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name in the fragment tested.

  • WCAG2A.Principle2.Guideline2_4.2_4_2.H25.1.NoTitleEl
    A title should be provided for the document, using a non-empty title element in the head section.

  • WCAG2A.Principle2.Guideline2_4.2_4_2.H25.1.EmptyTitle
    The title element in the head section should be non-empty.

  • WCAG2A.Principle2.Guideline2_4.2_4_2.H25.2
    Check that the title element describes the document.

  • WCAG2A.Principle2.Guideline2_4.2_4_3.H4.2
    If tabindex is used, check that the tab order specified by the tabindex attributes follows relationships in the content.

  • WCAG2A.Principle2.Guideline2_4.2_4_4.H77,H78,H79,H80,H81,H33
    Check that the link text combined with programmatically determined link context, or its title attribute, identifies the purpose of the link.

  • WCAG2A.Principle2.Guideline2_4.2_4_4.H77,H78,H79,H80,H81
    Check that the link text combined with programmatically determined link context identifies the purpose of the link.

  • WCAG2A.Principle3.Guideline3_1.3_1_1.H57.2
    The html element should have a lang or xml:lang attribute which describes the language of the document.

  • WCAG2A.Principle3.Guideline3_1.3_1_1.H57.3.Lang
    The language specified in the lang attribute of the document element does not appear to be well-formed.

  • WCAG2A.Principle3.Guideline3_1.3_1_1.H57.3.XmlLang
    The language specified in the xml:lang attribute of the document element does not appear to be well-formed.

  • WCAG2A.Principle3.Guideline3_2.3_2_1.G107
    Check that a change of context does not occur when any input field receives focus.

  • WCAG2A.Principle3.Guideline3_2.3_2_2.H32.2
    Form does not contain a submit button (input type="submit", input type="image", or button type="submit").

  • WCAG2A.Principle3.Guideline3_3.3_3_1.G83,G84,G85
    If an input error is automatically detected in this form, check that the item(s) in error are identified and the error(s) are described to the user in text.

  • WCAG2A.Principle3.Guideline3_3.3_3_2.G131,G89,G184,H90
    Check that descriptive labels or instructions (including for required fields) are provided for user input in this form.

  • WCAG2A.Principle4.Guideline4_1.4_1_1.F77
    Duplicate id attribute value "[Element ID]" found on the web page.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.Empty
    Anchor element found with an ID but without a href or link text. Consider moving its ID to a parent or nearby element.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.EmptyWithName
    Anchor element found with a name attribute but without a href or link text. Consider moving the name attribute to become an ID of a parent or nearby element.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.EmptyNoId
    Anchor element found with no link content and no name and/or ID attribute.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.NoHref
    Anchor elements should not be used for defining in-page link targets. If not using the ID for other purposes (such as CSS or scripting), consider moving it to a parent element.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.Placeholder
    Anchor element found with link content, but no href and/or ID attribute has been supplied.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.A.NoContent
    Anchor element found with a valid href attribute, but no link content has been supplied.

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Name
    This [element type] does not have a name available to an accessibility API. Valid names are [valid names for this element].

  • WCAG2A.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Value
    This [element type] does not have a value available to an accessibility API. Add one [using a element-specific method].

WCAG2AA

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H30.2
    Img element is the only content of the link, but is missing alt text. The alt text should describe the purpose of the link.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H37
    Img element missing an alt attribute. Use the alt attribute to specify a short text alternative.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H67.1
    Img element with empty alt text must have absent or empty title attribute.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H67.2
    Img element is marked so that it is ignored by Assistive Technology.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.G94.Image
    Ensure that the img element's alt text serves the same purpose and presents the same information as the image.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H36
    Image submit button missing an alt attribute. Specify a text alternative that describes the button's function, using the alt attribute

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.G94.Button
    Ensure that the image submit button's alt text identifies the purpose of the button.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H24
    Area element in an image map missing an alt attribute. Each area element must have a text alternative that describes the function of the image map area.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H24.2
    Ensure that the area element's text alternative serves the same purpose as the part of image map image it references.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.G73,G74
    If this image cannot be fully described in a short text alternative, ensure a long text alternative is also available, such as in the body text or through a link.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H2.EG5
    Img element inside a link must not use alt text that duplicates the text content of the link.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H2.EG4
    Img element inside a link has empty or missing alt text when a link beside it contains link text. Consider combining the links.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H2.EG3
    Img element inside a link must not use alt text that duplicates the content of a text link beside it.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H53
    Object elements must contain a text alternative after all other alternatives are exhausted.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.G94,G92.Object
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H35.3
    Applet elements must contain a text alternative in the element's body, for browsers without support for the applet element.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.H35.2
    Applet elements must contain an alt attribute, to provide a text alternative to browsers supporting the element but are unable to load the applet.

  • WCAG2AA.Principle1.Guideline1_1.1_1_1.G94,G92.Applet
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2AA.Principle1.Guideline1_2.1_2_1.G158
    If this embedded object contains pre-recorded audio only, and is not provided as an alternative for text content, check that an alternative text version is available.

  • WCAG2AA.Principle1.Guideline1_2.1_2_1.G159,G166
    If this embedded object contains pre-recorded video only, and is not provided as an alternative for text content, check that an alternative text version is available, or an audio track is provided that presents equivalent information.

  • WCAG2AA.Principle1.Guideline1_2.1_2_2.G87,G93
    If this embedded object contains pre-recorded synchronised media and is not provided as an alternative for text content, check that captions are provided for audio content.

  • WCAG2AA.Principle1.Guideline1_2.1_2_4.G9,G87,G93
    If this embedded object contains synchronised media, check that captions are provided for live audio content.

  • WCAG2AA.Principle1.Guideline1_2.1_2_5.G78,G173,G8
    If this embedded object contains pre-recorded synchronised media, check that an audio description is provided for its video content.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H42.2
    Heading tag found with no content. Text that is not intended as a heading should not be marked up with heading tags.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H93
    Multiple labels exist with the same "for" attribute. If these labels refer to different form controls, the controls should have unique "id" attributes.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NonExistent
    This label's "for" attribute contains an ID that does not exist in the document.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NonExistentFragment
    This label's "for" attribute contains an ID that does not exist in the document fragment.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NotFormControl
    This label's "for" attribute contains an ID that points to an element that is not a form control.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NoForAttr
    Label found without a "for" attribute, and therefore not explicitly associated with a form control.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NoId
    Form control does not have an ID, therefore it cannot have an explicit label.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H65.3
    Form control without a label contains an empty title attribute. The title attribute should identify the purpose of the control.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H65
    Check that the title attribute identifies the purpose of the control, and that a label element is not appropriate.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.2
    Form control does not have an explicit label or title attribute, identifying the purpose of the control.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.NoLabelAllowed
    Label element should not be used for this type of form control.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.1.After
    The label element for this control should be placed after this element.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H44.1.Before
    The label element for this control should be placed before this element.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H49.[NodeName]
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H49.AlignAttr
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H42
    Heading markup should be used if this content is intended as a heading.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H63.3
    Table cell has an invalid scope attribute. Valid values are row, col, rowgroup, or colgroup.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H63.2
    Scope attributes on td elements that act as headers for other elements are obsolete in HTML5. Use a th element instead.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43.ScopeAmbiguous
    Scope attributes on th elements are ambiguous in a table with multiple levels of headings. Use the headers attribute on td elements instead.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43.IncorrectAttr
    Incorrect headers attribute on this td element. Expected "[expected headers]" but found "[actual headers]"

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43.HeadersRequired
    The relationship between td elements and their associated th elements is not defined. As this table has multiple levels of th elements, you must use the headers attribute on td elements.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43.MissingHeaderIds
    Not all th elements in this table contain an id attribute. These cells should contain ids so that they may be referenced by td elements headers attributes.'

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43.MissingHeadersAttrs
    Not all td elements in this table contain a headers attribute. Each headers attribute should list the ids of all th elements associated with that cell.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H43,H63
    The relationship between td elements and their associated th elements is not defined. Use either the scope attribute on th elements, or the headers attribute on td elements.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H63.1
    Not all th elements in this table have a scope attribute. These cells should contain a scope attribute to identify their association with td elements.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H39,H73.4
    If this table is a data table, and both a summary attribute and a caption element are present, the summary should not duplicate the caption.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H73.3.Check
    If this table is a data table, check that the summary attribute describes the tables organization or explains how to use the table.'

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H73.3.NoSummary
    If this table is a data table, consider using the summary attribute of the table element to give an overview of this table.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H39.3.Check
    If this table is a data table, check that the caption element accurately describes this table.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H39.3.NoCaption
    If this table is a data table, consider using a caption element to the table element to identify this table.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H71.3
    Fieldset does not contain a legend element. All fieldsets should contain a legend element that describes a description of the field group.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H85.2
    If this selection list contains groups of related options, they should be grouped with optgroup.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H71.2
    Radio buttons or check boxes with the same name attribute must be contained within a fieldset element.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H48.1
    Content appears to have the visual appearance of a bulleted list. It may be appropriate to mark this content up using a ul element.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H48.2
    Content appears to have the visual appearance of a numbered list. It may be appropriate to mark this content up using an ol element.

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.G141
    The heading structure is not logically nested. This [heading] element (should be a [correct heading] to be properly nested / appears to be the primary document heading, so should be an h1 element).

  • WCAG2AA.Principle1.Guideline1_3.1_3_1.H48
    If this element contains a navigation section, it is recommended that it be marked up as a list.

  • WCAG2AA.Principle1.Guideline1_3.1_3_2.G57
    Check that the content is ordered in a meaningful sequence when linearised, such as when style sheets are disabled.

  • WCAG2AA.Principle1.Guideline1_3.1_3_3.G96
    Where instructions are provided for understanding the content, do not rely on sensory characteristics alone (such as shape, size or location) to describe objects.

  • WCAG2AA.Principle1.Guideline1_4.1_4_1.G14,G182
    Check that any information conveyed using colour alone is also available in text, or through other visual cues.

  • WCAG2AA.Principle1.Guideline1_4.1_4_2.F23
    If any audio plays automatically for longer than 3 seconds, check that there is the ability to pause, stop or mute the audio.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.G18
    This element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of {value}. Recommendation: {colour recommendations}.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.G145
    This element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 3:1, but text in this element has a contrast ratio of {value}. Recommendation: {colour recommendations}.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.G18
    This element's text is placed on a background image. Ensure the contrast ratio between the text and all covered parts of the image are at least 4.5:1.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.G145
    This element's text is placed on a background image. Ensure the contrast ratio between the text and all covered parts of the image are at least 3:1.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.F24.BGColour
    Check that this element has an inherited foreground colour to complement the corresponding inline background colour or image.

  • WCAG2AA.Principle1.Guideline1_4.1_4_3.F24.FGColour
    Check that this element has an inherited background colour or image to complement the corresponding inline foreground colour.

  • WCAG2AA.Principle1.Guideline1_4.1_4_4.G142
    Check that text can be resized without assistive technology up to 200 percent without loss of content or functionality.

  • WCAG2AA.Principle1.Guideline1_4.1_4_5.G140,C22,C30.AALevel
    If the technologies being used can achieve the visual presentation, check that text is used to convey information rather than images of text, except when the image of text is essential to the information being conveyed, or can be visually customised to the user's requirements.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.DblClick
    Ensure the functionality provided by double-clicking on this element is available through the keyboard.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.MouseOver
    Ensure the functionality provided by mousing over this element is available through the keyboard; for instance, using the focus event.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.MouseOut
    Ensure the functionality provided by mousing out of this element is available through the keyboard; for instance, using the blur event.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.MouseMove
    Ensure the functionality provided by moving the mouse on this element is available through the keyboard.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.MouseDown
    Ensure the functionality provided by mousing down on this element is available through the keyboard; for instance, using the keydown event.

  • WCAG2AA.Principle2.Guideline2_1.2_1_1.SCR20.MouseUp
    Ensure the functionality provided by mousing up on this element is available through the keyboard; for instance, using the keyup event.

  • WCAG2AA.Principle2.Guideline2_1.2_1_2.F10
    Check that this applet or plugin provides the ability to move the focus away from itself when using the keyboard.

  • WCAG2AA.Principle2.Guideline2_2.2_2_1.F40.2
    Meta refresh tag used to redirect to another page, with a time limit that is not zero. Users cannot control this time limit.

  • WCAG2AA.Principle2.Guideline2_2.2_2_1.F41.2
    Meta refresh tag used to refresh the current page. Users cannot control the time limit for this refresh.

  • WCAG2AA.Principle2.Guideline2_2.2_2_2.SCR33,SCR22,G187,G152,G186,G191
    If any part of the content moves, scrolls or blinks for more than 5 seconds, or auto-updates, check that there is a mechanism available to pause, stop, or hide the content.

  • WCAG2AA.Principle2.Guideline2_2.2_2_2.F4
    Ensure there is a mechanism available to stop this blinking element in less than five seconds.

  • WCAG2AA.Principle2.Guideline2_2.2_2_2.F47
    Blink elements cannot satisfy the requirement that blinking information can be stopped within five seconds.

  • WCAG2AA.Principle2.Guideline2_3.2_3_1.G19,G176
    Check that no component of the content flashes more than three times in any 1-second period, or that the size of any flashing area is sufficiently small.

  • WCAG2AA.Principle2.Guideline2_4.2_4_1.H64.1
    Iframe element requires a non-empty title attribute that identifies the frame.

  • WCAG2AA.Principle2.Guideline2_4.2_4_1.H64.2
    Check that the title attribute of this element contains text that identifies the frame.

  • WCAG2AA.Principle2.Guideline2_4.2_4_1.G1,G123,G124,H69
    Ensure that any common navigation elements can be bypassed; for instance, by use of skip links, header elements, or ARIA landmark roles.

  • WCAG2AA.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchId
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name.

  • WCAG2AA.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchIdFragment2.4.2
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name in the fragment tested.

  • WCAG2AA.Principle2.Guideline2_4.2_4_2.H25.1.NoTitleEl
    A title should be provided for the document, using a non-empty title element in the head section.

  • WCAG2AA.Principle2.Guideline2_4.2_4_2.H25.1.EmptyTitle
    The title element in the head section should be non-empty.

  • WCAG2AA.Principle2.Guideline2_4.2_4_2.H25.2
    Check that the title element describes the document.

  • WCAG2AA.Principle2.Guideline2_4.2_4_3.H4.2
    If tabindex is used, check that the tab order specified by the tabindex attributes follows relationships in the content.

  • WCAG2AA.Principle2.Guideline2_4.2_4_4.H77,H78,H79,H80,H81,H33
    Check that the link text combined with programmatically determined link context, or its title attribute, identifies the purpose of the link.

  • WCAG2AA.Principle2.Guideline2_4.2_4_4.H77,H78,H79,H80,H81
    Check that the link text combined with programmatically determined link context identifies the purpose of the link.

  • WCAG2AA.Principle2.Guideline2_4.2_4_5.G125,G64,G63,G161,G126,G185
    If this Web page is not part of a linear process, check that there is more than one way of locating this Web page within a set of Web pages.

  • WCAG2AA.Principle2.Guideline2_4.2_4_6.G130,G131
    Check that headings and labels describe topic or purpose.

  • WCAG2AA.Principle2.Guideline2_4.2_4_7.G149,G165,G195,C15,SCR31
    Check that there is at least one mode of operation where the keyboard focus indicator can be visually located on user interface controls.

  • WCAG2AA.Principle3.Guideline3_1.3_1_1.H57.2
    The html element should have a lang or xml:lang attribute which describes the language of the document.

  • WCAG2AA.Principle3.Guideline3_1.3_1_1.H57.3.Lang
    The language specified in the lang attribute of the document element does not appear to be well-formed.

  • WCAG2AA.Principle3.Guideline3_1.3_1_1.H57.3.XmlLang
    The language specified in the xml:lang attribute of the document element does not appear to be well-formed.

  • WCAG2AA.Principle3.Guideline3_1.3_1_2.H58
    Ensure that any change in language is marked using the lang and/or xml:lang attribute on an element, as appropriate.

  • WCAG2AA.Principle3.Guideline3_1.3_1_2.H58.1.Lang
    The language specified in the lang attribute of this element does not appear to be well-formed.

  • WCAG2AA.Principle3.Guideline3_1.3_1_2.H58.1.XmlLang
    The language specified in the xml:lang attribute of this element does not appear to be well-formed.

  • WCAG2AA.Principle3.Guideline3_2.3_2_1.G107
    Check that a change of context does not occur when any input field receives focus.

  • WCAG2AA.Principle3.Guideline3_2.3_2_2.H32.2
    Form does not contain a submit button (input type="submit", input type="image", or button type="submit").

  • WCAG2AA.Principle3.Guideline3_2.3_2_3.G61
    Check that navigational mechanisms that are repeated on multiple Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user.

  • WCAG2AA.Principle3.Guideline3_2.3_2_4.G197
    Check that components that have the same functionality within this Web page are identified consistently in the set of Web pages to which it belongs.

  • WCAG2AA.Principle3.Guideline3_3.3_3_1.G83,G84,G85
    If an input error is automatically detected in this form, check that the item(s) in error are identified and the error(s) are described to the user in text.

  • WCAG2AA.Principle3.Guideline3_3.3_3_2.G131,G89,G184,H90
    Check that descriptive labels or instructions (including for required fields) are provided for user input in this form.

  • WCAG2AA.Principle3.Guideline3_3.3_3_3.G177
    Check that this form provides suggested corrections to errors in user input, unless it would jeopardize the security or purpose of the content.

  • WCAG2AA.Principle3.Guideline3_3.3_3_4.G98,G99,G155,G164,G168.LegalForms
    If this form would bind a user to a financial or legal commitment, modify/delete user-controllable data, or submit test responses, ensure that submissions are either reversible, checked for input errors, and/or confirmed by the user.

  • WCAG2AA.Principle4.Guideline4_1.4_1_1.F77
    Duplicate id attribute value "[Element ID]" found on the web page.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.Empty
    Anchor element found with an ID but without a href or link text. Consider moving its ID to a parent or nearby element.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.EmptyWithName
    Anchor element found with a name attribute but without a href or link text. Consider moving the name attribute to become an ID of a parent or nearby element.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.EmptyNoId
    Anchor element found with no link content and no name and/or ID attribute.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoHref
    Anchor elements should not be used for defining in-page link targets. If not using the ID for other purposes (such as CSS or scripting), consider moving it to a parent element.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.Placeholder
    Anchor element found with link content, but no href and/or ID attribute has been supplied.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent
    Anchor element found with a valid href attribute, but no link content has been supplied.

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Name
    This [element type] does not have a name available to an accessibility API. Valid names are [valid names for this element].

  • WCAG2AA.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Value
    This [element type] does not have a value available to an accessibility API. Add one [using a element-specific method].

WCAG2AAA

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H30.2
    Img element is the only content of the link, but is missing alt text. The alt text should describe the purpose of the link.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H37
    Img element missing an alt attribute. Use the alt attribute to specify a short text alternative.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H67.1
    Img element with empty alt text must have absent or empty title attribute.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H67.2
    Img element is marked so that it is ignored by Assistive Technology.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.G94.Image
    Ensure that the img element's alt text serves the same purpose and presents the same information as the image.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H36
    Image submit button missing an alt attribute. Specify a text alternative that describes the button's function, using the alt attribute

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.G94.Button
    Ensure that the image submit button's alt text identifies the purpose of the button.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H24
    Area element in an image map missing an alt attribute. Each area element must have a text alternative that describes the function of the image map area.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H24.2
    Ensure that the area element's text alternative serves the same purpose as the part of image map image it references.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.G73,G74
    If this image cannot be fully described in a short text alternative, ensure a long text alternative is also available, such as in the body text or through a link.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H2.EG5
    Img element inside a link must not use alt text that duplicates the text content of the link.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H2.EG4
    Img element inside a link has empty or missing alt text when a link beside it contains link text. Consider combining the links.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H2.EG3
    Img element inside a link must not use alt text that duplicates the content of a text link beside it.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H53
    Object elements must contain a text alternative after all other alternatives are exhausted.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.G94,G92.Object
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H35.3
    Applet elements must contain a text alternative in the element's body, for browsers without support for the applet element.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.H35.2
    Applet elements must contain an alt attribute, to provide a text alternative to browsers supporting the element but are unable to load the applet.

  • WCAG2AAA.Principle1.Guideline1_1.1_1_1.G94,G92.Applet
    Check that short (and if appropriate, long) text alternatives are available for non-text content that serve the same purpose and present the same information.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_1.G158
    If this embedded object contains pre-recorded audio only, and is not provided as an alternative for text content, check that an alternative text version is available.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_1.G159,G166
    If this embedded object contains pre-recorded video only, and is not provided as an alternative for text content, check that an alternative text version is available, or an audio track is provided that presents equivalent information.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_2.G87,G93
    If this embedded object contains pre-recorded synchronised media and is not provided as an alternative for text content, check that captions are provided for audio content.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_4.G9,G87,G93
    If this embedded object contains synchronised media, check that captions are provided for live audio content.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_5.G78,G173,G8
    If this embedded object contains pre-recorded synchronised media, check that an audio description is provided for its video content.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_6.G54,G81
    If this embedded object contains pre-recorded synchronised media, check that a sign language interpretation is provided for its audio.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_7.G8
    If this embedded object contains synchronised media, and where pauses in foreground audio is not sufficient to allow audio descriptions to convey the sense of pre-recorded video, check that an extended audio description is provided, either through scripting or an alternate version.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_8.G69,G159
    If this embedded object contains pre-recorded synchronised media or video-only content, check that an alternative text version of the content is provided.

  • WCAG2AAA.Principle1.Guideline1_2.1_2_9.G150,G151,G157
    If this embedded object contains live audio-only content, check that an alternative text version of the content is provided.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H42.2
    Heading tag found with no content. Text that is not intended as a heading should not be marked up with heading tags.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H93
    Multiple labels exist with the same "for" attribute. If these labels refer to different form controls, the controls should have unique "id" attributes.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NonExistent
    This label's "for" attribute contains an ID that does not exist in the document.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NonExistentFragment
    This label's "for" attribute contains an ID that does not exist in the document fragment.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NotFormControl
    This label's "for" attribute contains an ID that points to an element that is not a form control.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NoForAttr
    Label found without a "for" attribute, and therefore not explicitly associated with a form control.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NoId
    Form control does not have an ID, therefore it cannot have an explicit label.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H65.3
    Form control without a label contains an empty title attribute. The title attribute should identify the purpose of the control.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H65
    Check that the title attribute identifies the purpose of the control, and that a label element is not appropriate.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.2
    Form control does not have an explicit label or title attribute, identifying the purpose of the control.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.NoLabelAllowed
    Label element should not be used for this type of form control.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.1.After
    The label element for this control should be placed after this element.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H44.1.Before
    The label element for this control should be placed before this element.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H49.[NodeName]
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H49.AlignAttr
    Semantic markup should be used to mark emphasised or special text so that it can be programmatically determined.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H42
    Heading markup should be used if this content is intended as a heading.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H63.3
    Table cell has an invalid scope attribute. Valid values are row, col, rowgroup, or colgroup.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H63.2
    Scope attributes on td elements that act as headers for other elements are obsolete in HTML5. Use a th element instead.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43.ScopeAmbiguous
    Scope attributes on th elements are ambiguous in a table with multiple levels of headings. Use the headers attribute on td elements instead.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43.IncorrectAttr
    Incorrect headers attribute on this td element. Expected "[expected headers]" but found "[actual headers]"

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43.HeadersRequired
    The relationship between td elements and their associated th elements is not defined. As this table has multiple levels of th elements, you must use the headers attribute on td elements.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43.MissingHeaderIds
    Not all th elements in this table contain an id attribute. These cells should contain ids so that they may be referenced by td elements headers attributes.'

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43.MissingHeadersAttrs
    Not all td elements in this table contain a headers attribute. Each headers attribute should list the ids of all th elements associated with that cell.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H43,H63
    The relationship between td elements and their associated th elements is not defined. Use either the scope attribute on th elements, or the headers attribute on td elements.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H63.1
    Not all th elements in this table have a scope attribute. These cells should contain a scope attribute to identify their association with td elements.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H39,H73.4
    If this table is a data table, and both a summary attribute and a caption element are present, the summary should not duplicate the caption.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H73.3.Check
    If this table is a data table, check that the summary attribute describes the tables organization or explains how to use the table.'

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H73.3.NoSummary
    If this table is a data table, consider using the summary attribute of the table element to give an overview of this table.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H39.3.Check
    If this table is a data table, check that the caption element accurately describes this table.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H39.3.NoCaption
    If this table is a data table, consider using a caption element to the table element to identify this table.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H71.3
    Fieldset does not contain a legend element. All fieldsets should contain a legend element that describes a description of the field group.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H85.2
    If this selection list contains groups of related options, they should be grouped with optgroup.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H71.2
    Radio buttons or check boxes with the same name attribute must be contained within a fieldset element.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H48.1
    Content appears to have the visual appearance of a bulleted list. It may be appropriate to mark this content up using a ul element.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H48.2
    Content appears to have the visual appearance of a numbered list. It may be appropriate to mark this content up using an ol element.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.G141
    The heading structure is not logically nested. This [heading] element (should be a [correct heading] to be properly nested / appears to be the primary document heading, so should be an h1 element).

  • WCAG2AAA.Principle1.Guideline1_3.1_3_1.H48
    If this element contains a navigation section, it is recommended that it be marked up as a list.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_2.G57
    Check that the content is ordered in a meaningful sequence when linearised, such as when style sheets are disabled.

  • WCAG2AAA.Principle1.Guideline1_3.1_3_3.G96
    Where instructions are provided for understanding the content, do not rely on sensory characteristics alone (such as shape, size or location) to describe objects.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_1.G14,G182
    Check that any information conveyed using colour alone is also available in text, or through other visual cues.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_2.F23
    If any audio plays automatically for longer than 3 seconds, check that there is the ability to pause, stop or mute the audio.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_6.G17
    This element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 7:1, but text in this element has a contrast ratio of {value}. Recommendation: {colour recommendations}.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_6.G18
    This element has insufficient contrast at this conformance level. Expected a contrast ratio of at least 4.5:1, but text in this element has a contrast ratio of {value}. Recommendation: {colour recommendations}.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_6.G17
    This element's text is placed on a background image. Ensure the contrast ratio between the text and all covered parts of the image are at least 7:1.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_6.G18
    This element's text is placed on a background image. Ensure the contrast ratio between the text and all covered parts of the image are at least 4.5:1.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_7.G56
    For pre-recorded audio-only content that is primarily speech (such as narration), any background sounds should be muteable, or be at least 20 dB (or about 4 times) quieter than the speech.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_8.G148,G156,G175
    Check that a mechanism is available for the user to select foreground and background colours for blocks of text, either through the Web page or the browser.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_8.H87,C20
    Check that a mechanism exists to reduce the width of a block of text to no more than 80 characters (or 40 in Chinese, Japanese or Korean script).

  • WCAG2AAA.Principle1.Guideline1_4.1_4_8.C19,G172,G169
    Check that blocks of text are not fully justified - that is, to both left and right edges - or a mechanism exists to remove full justification.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_8.G188,C21
    Check that line spacing in blocks of text are at least 150% in paragraphs, and paragraph spacing is at least 1.5 times the line spacing, or that a mechanism is available to achieve this.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_8.H87,G146,C26
    Check that text can be resized without assistive technology up to 200 percent without requiring the user to scroll horizontally on a full-screen window.

  • WCAG2AAA.Principle1.Guideline1_4.1_4_9.G140,C22,C30.NoException
    Check that images of text are only used for pure decoration or where a particular presentation of text is essential to the information being conveyed.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.DblClick
    Ensure the functionality provided by double-clicking on this element is available through the keyboard.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.MouseOver
    Ensure the functionality provided by mousing over this element is available through the keyboard; for instance, using the focus event.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.MouseOut
    Ensure the functionality provided by mousing out of this element is available through the keyboard; for instance, using the blur event.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.MouseMove
    Ensure the functionality provided by moving the mouse on this element is available through the keyboard.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.MouseDown
    Ensure the functionality provided by mousing down on this element is available through the keyboard; for instance, using the keydown event.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_1.SCR20.MouseUp
    Ensure the functionality provided by mousing up on this element is available through the keyboard; for instance, using the keyup event.

  • WCAG2AAA.Principle2.Guideline2_1.2_1_2.F10
    Check that this applet or plugin provides the ability to move the focus away from itself when using the keyboard.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_1.F40.2
    Meta refresh tag used to redirect to another page, with a time limit that is not zero. Users cannot control this time limit.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_1.F41.2
    Meta refresh tag used to refresh the current page. Users cannot control the time limit for this refresh.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_2.SCR33,SCR22,G187,G152,G186,G191
    If any part of the content moves, scrolls or blinks for more than 5 seconds, or auto-updates, check that there is a mechanism available to pause, stop, or hide the content.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_2.F4
    Ensure there is a mechanism available to stop this blinking element in less than five seconds.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_2.F47
    Blink elements cannot satisfy the requirement that blinking information can be stopped within five seconds.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_3.G5
    Check that timing is not an essential part of the event or activity presented by the content, except for non-interactive synchronized media and real-time events.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_4.SCR14
    Check that all interruptions (including updates to content) can be postponed or suppressed by the user, except interruptions involving an emergency.

  • WCAG2AAA.Principle2.Guideline2_2.2_2_5.G105,G181
    If this Web page is part of a set of Web pages with an inactivity time limit, check that an authenticated user can continue the activity without loss of data after re-authenticating.

  • WCAG2AAA.Principle2.Guideline2_3.2_3_2.G19
    Check that no component of the content flashes more than three times in any 1-second period.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_1.H64.1
    Iframe element requires a non-empty title attribute that identifies the frame.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_1.H64.2
    Check that the title attribute of this element contains text that identifies the frame.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_1.G1,G123,G124,H69
    Ensure that any common navigation elements can be bypassed; for instance, by use of skip links, header elements, or ARIA landmark roles.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchId
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_1.G1,G123,G124.NoSuchIdFragment2.4.2
    This link points to a named anchor "[link target]" within the document, but no anchor exists with that name in the fragment tested.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_2.H25.1.NoTitleEl
    A title should be provided for the document, using a non-empty title element in the head section.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_2.H25.1.EmptyTitle
    The title element in the head section should be non-empty.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_2.H25.2
    Check that the title element describes the document.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_3.H4.2
    If tabindex is used, check that the tab order specified by the tabindex attributes follows relationships in the content.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_5.G125,G64,G63,G161,G126,G185
    If this Web page is not part of a linear process, check that there is more than one way of locating this Web page within a set of Web pages.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_6.G130,G131
    Check that headings and labels describe topic or purpose.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_7.G149,G165,G195,C15,SCR31
    Check that there is at least one mode of operation where the keyboard focus indicator can be visually located on user interface controls.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_8.H59.1
    Link elements can only be located in the head section of the document.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_8.H59.2a
    Link element is missing a non-empty rel attribute identifying the link type.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_8.H59.2b
    Link element is missing a non-empty href attribute pointing to the resource being linked.

  • WCAG2AAA.Principle2.Guideline2_4.2_4_9.H30
    Check that text of the link describes the purpose of the link.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_1.H57.2
    The html element should have a lang or xml:lang attribute which describes the language of the document.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_1.H57.3.Lang
    The language specified in the lang attribute of the document element does not appear to be well-formed.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_1.H57.3.XmlLang
    The language specified in the xml:lang attribute of the document element does not appear to be well-formed.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_2.H58
    Ensure that any change in language is marked using the lang and/or xml:lang attribute on an element, as appropriate.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_2.H58.1.Lang
    The language specified in the lang attribute of this element does not appear to be well-formed.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_2.H58.1.XmlLang
    The language specified in the xml:lang attribute of this element does not appear to be well-formed.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_3.H40,H54,H60,G62,G70
    Check that there is a mechanism available for identifying specific definitions of words or phrases used in an unusual or restricted way, including idioms and jargon.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_4.G102,G55,G62,H28,G97
    Check that a mechanism for identifying the expanded form or meaning of abbreviations is available.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_5.G86,G103,G79,G153,G160
    Where the content requires reading ability more advanced than the lower secondary education level, supplemental content or an alternative version should be provided.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_6.H62.1.HTML5
    Ruby element does not contain an rt element containing pronunciation information for its body text.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_6.H62.1.XHTML11
    Ruby element does not contain an rt element containing pronunciation information for the text inside the rb element.

  • WCAG2AAA.Principle3.Guideline3_1.3_1_6.H62.2
    Ruby element does not contain rp elements, which provide extra punctuation to browsers not supporting ruby text.

  • WCAG2AAA.Principle3.Guideline3_2.3_2_1.G107
    Check that a change of context does not occur when any input field receives focus.

  • WCAG2AAA.Principle3.Guideline3_2.3_2_2.H32.2
    Form does not contain a submit button (input type="submit", input type="image", or button type="submit").

  • WCAG2AAA.Principle3.Guideline3_2.3_2_3.G61
    Check that navigational mechanisms that are repeated on multiple Web pages occur in the same relative order each time they are repeated, unless a change is initiated by the user.

  • WCAG2AAA.Principle3.Guideline3_2.3_2_4.G197
    Check that components that have the same functionality within this Web page are identified consistently in the set of Web pages to which it belongs.

  • WCAG2AAA.Principle3.Guideline3_2.3_2_5.H83.3
    Check that this link's link text contains information indicating that the link will open in a new window.

  • WCAG2AAA.Principle3.Guideline3_3.3_3_1.G83,G84,G85
    If an input error is automatically detected in this form, check that the item(s) in error are identified and the error(s) are described to the user in text.

  • WCAG2AAA.Principle3.Guideline3_3.3_3_2.G131,G89,G184,H90
    Check that descriptive labels or instructions (including for required fields) are provided for user input in this form.

  • WCAG2AAA.Principle3.Guideline3_3.3_3_3.G177
    Check that this form provides suggested corrections to errors in user input, unless it would jeopardize the security or purpose of the content.

  • WCAG2AAA.Principle3.Guideline3_3.3_3_5.G71,G184,G193
    Check that context-sensitive help is available for this form, at a Web-page and/or control level.

  • WCAG2AAA.Principle3.Guideline3_3.3_3_6.G98,G99,G155,G164,G168.AllForms
    Check that submissions to this form are either reversible, checked for input errors, and/or confirmed by the user.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_1.F77
    Duplicate id attribute value "[Element ID]" found on the web page.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.Empty
    Anchor element found with an ID but without a href or link text. Consider moving its ID to a parent or nearby element.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.EmptyWithName
    Anchor element found with a name attribute but without a href or link text. Consider moving the name attribute to become an ID of a parent or nearby element.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.EmptyNoId
    Anchor element found with no link content and no name and/or ID attribute.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.NoHref
    Anchor elements should not be used for defining in-page link targets. If not using the ID for other purposes (such as CSS or scripting), consider moving it to a parent element.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.Placeholder
    Anchor element found with link content, but no href and/or ID attribute has been supplied.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.A.NoContent
    Anchor element found with a valid href attribute, but no link content has been supplied.

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Name
    This [element type] does not have a name available to an accessibility API. Valid names are [valid names for this element].

  • WCAG2AAA.Principle4.Guideline4_1.4_1_2.H91.[NodeName].Value
    This [element type] does not have a value available to an accessibility API. Add one [using a element-specific method].