Reference to the 'direction' attribute is missing from the definition of the 'svg' element

[iherman]

The definition of the SVG Element includes the list of all allowable attribute; the list does not contain a reference to the direction attribute.

On the other hand, the definition of the direction attribute explicitly refers to:

For other cases, such as when using right-to-left languages, it may be sufficient to add the direction property to the outermost svg element […]

and the examples also use the attribute on the SVG element.

I believe that, due to the nature of that attribute, it should indeed be allowed on the SVG element, alongside with, say, lang.

Cc @r12a

[iherman]

Actually... I just realized that the same problem occurs for the text element... Is the real bug that the attribute is not listed as a core attribute (alongside lang)?