Default language expansion

[ascholerChemeketa]

This adds support for default programming language to parsons, hparsons, and codelens.

Also adds a few examples/tests and schema entry.

[ascholerChemeketa]

Did some cleanup and a bug fix to Codelens trace generation. I think this is set.

[ascholerChemeketa]

@rbeezer Added the RS manifest default language. To do that with existing code, I allow get-programming-language to match anything (in this case it needs to match book). I know you like narrow matches, but in this case I think being permissive is better.

It means you can use it anywhere and get a string that is either the @language or the default or an empty string.

If get-programming-language fails to match, then any attempt to use it that fails (including indirectly through the xxx-language templates below it) returns the entire node that came in (matches some copy template elsewhere I assume). Which is really odd behavior for something that is supposed to just return the name of a programming language.

[ascholerChemeketa]

Looking into a possible other manifest info. Converting to draft until done.

[ascholerChemeketa]

False alarm... thought codelens was missing data-language, but it doesn't need it.

I believe this is set.

[rbeezer]

fails to match, then any attempt to use it that fails

General approach, which is not to suggest it needs to be this way here:

Make a narrow match template that you want. Then make a catch-all template (select="*") that uses xsl:message to say, "Oops, something went haywire" and yields no result, rather than the built-in universal default template that is producing all the content that you find odd behavior.

[ascholerChemeketa]

Make a narrow match template that you want. Then make a catch-all template (select="*") that uses xsl:message to say, "Oops, something went haywire" and yields no result

That makes sense, thanks.