General ⇒ listings package: defining own language

[mychi]

I want to define rules for the programming language XQuery that build on top of the already defined rules for XML. The User's Guide already helped a lot in certain things I wanted to do with the listings package. But now I'm at a loss with the following problem (simplified as much as possible):

Code: Select all

Code, edit and compile here:

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\documentclass{article}
\usepackage{listings}
\lstdefinelanguage{XQuery}[]{XML}{
    tag=[s]<>,  % =*: also apply styles within tag, =**: cumulate styles
    morekeywords={text},
    sensitive=false
}
\lstset{%
    language=XQuery,
    tagstyle=\bfseries,
    keywordstyle=\underbar,
    stringstyle=\itshape,
    showstringspaces=false
}
\begin{document}
\begin{lstlisting}
text <hello type='text/plain'>world</hello>/text()
\end{lstlisting}
\end{document}
 
 
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which results in:

text <hello type='text/plain'>world</hello>/text()

whereas the desired output would be:

text <hello type='text/plain'>world</hello>/text()

In particular the word "text" within the hello-tag should NOT be underlined (because there are no * or ** in the definition of "tag=[s]<>"). In fact if you put one or two *, that part works as expected ("text" is in stringstyle (italics) or stringstyle+tagstyle (italics and bold) respectively).

But the "text" words outside don't get their keywordstyle in either of the cases.

I did have a look at lstdrvrs.dtx, where XML is defined. But I couldn't work out what the cause could be.

Does anyone have an idea? Is there somebody in this forum who already did (try to) define an own language as well?

Cheers