If we do this it works just fine
<util:include-expr>
<util:expr><xsp:expr>
<xsp-request:get-attribute name="xmlData" />
</xsp:expr></util:expr>
</util:include-expr>
This doesn't work with the error below.
<util:include-expr>
<util:expr>
<xsp:expr>
<xsp-request:get-attribute name="xmlData" />
</xsp:expr>
</util:expr>
</util:include-expr>
org.apache.cocoon.ProcessingException: Language Exception: org.apache.cocoon.components.language.LanguageException: Error compiling ServerList_xsp: Line 127, column 28: ')' expected. Line 0, column 0: 1 error
Not a huge problem but something to note.