Errors handling for 'background-image' and 'src' attributes. about focheck

[tgraham-antenna]

Does not occur with current focheck. Was fixed in focheck 0.5.4.

The 'syntax error' message was because the URL was being parsed as an expression in the expression language. Section 5.9, Expressions, of XSL 1.1 (https://www.w3.org/TR/xsl/#d0e5032) says that "All property value specifications in attributes within an XSL stylesheet can be expressions." focheck tries to parse every expression except for the ones where it's told not to. background-image/@src wasn't added to that list until recently.

The spec also says that @src should be a <uri-specification>, which is supposed to have url(...) around the URI, but every formatter ignores that requirement and works with bare URIs as well.

[raducoravu]

Thanks @tgraham-antenna and sorry for the false report, we'll update the framework shipped with Oxygen.