Linter: report any errors in types declared on xslt instructions within the 'as' attribute #144
Description
Errors within the 'as' attribute of XSLT instructions should be highlighted for the user
The linter checks tokens for types in XPath expressions, for example xs:integer, within the expression castable as xs:integer.
Currently, the contents of the 'as' attribute value for XSLT instructions is only tokenised as an attribute value, it is not explicitly tokenised as XPath.