Message
multiple (
alt-text
, long-desc
) elements for different languages must be identified using the xml:lang attribute
Rule XPath:
This rule REPORTS an alert when the following is TRUE:
(self::alt-text and preceding-sibling::alt-text and (not(@xml:lang) or @xml:lang =
preceding-sibling::alt-text/@xml:lang)) or (self::long-desc and preceding-sibling::long-desc
and (not(@xml:lang) or @xml:lang = preceding-sibling::long-desc/@xml:lang))