Clarify validation of undefined items in TT namespaces #321
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spec/ttml1.xml
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| @@ -1097,6 +1097,35 @@ conformant <emph>Document Instance</emph>, a given <emph>Document Instance</emph | |||
| constrained by the author or authoring tool to satisfy a more | |||
| restrictive definition of validity.</p> | |||
| </note> | |||
| <note> | |||
| <p>As illustrated in the following example, an <emph>Abstract Document Instance</emph> can be a <emph>Valid Abstract Document Instance</emph> even if it includes elements and attributes whose namespace names are listed in <specref ref="namespace-vocab-table"/> but are not defined in this version of the specification. Specifically, the element <code>foo</code> and the attribute <att>tts:foo</att> are pruned by above steps (1) and (3), respectively, because they are not members of the associated <emph>Abstract Document Type</emph>, even though their namespace names are listed in <specref ref="namespace-vocab-table"/>. | |||
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How can an element or attribute have a namespace name that is both listed in the table and not defined in the specification? Is that supposed to say that its namespace is listed in the table but its name is not defined within that namespace by this specification?
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Edited comment: Removed comments on the use of the term "namespace name" after checking the namespace spec.
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Is that supposed to say that its namespace is listed in the table but its name is not defined within that namespace by this specification?
Yes.
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It seems to be more common in the spec to explain the example in following text rather than preceding text. Suggest moving the explanation to here.
spec/ttml1.xml
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| @@ -1132,6 +1161,9 @@ which all foreign namespace elements and attributes have been removed. Therefore | |||
| exceptional reporting of this false negative does not impact the formal assessment | |||
| of <emph>Document Instance</emph> validity.</p> | |||
| </note> | |||
| <note role="clarification"> | |||
| <p>The schemas referenced by this specification are designed for use after the pruning steps (1)-(3) specified by <specref ref="doctypes"/> have been applied.</p> | |||
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I think I'd prefer "intended" rather than "designed" here but that's a minor point.
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This change may need modification to match what gets written into TTML2 on this subject. |
Closes #251