This problem is envisaged in the XSLT spec. See §11.1.2:
The xml:base, xml:lang, xml:space, and xml:id attributes have two effects in
XSLT. They behave as standard XSLT attributes, which means for example that if
they appear on a literal result element, they will be copied to the result tree
in the same way as any other attribute. In addition, they have their standard
meaning as defined in the core XML specifications. Thus, an xml:base attribute
in the stylesheet affects the base URI of the element on which it appears, and
an xml:space attribute affects the interpretation of whitespace text nodes
within that element. One consequence of this is that it is inadvisable to write
these attributes as attribute value templates: although an XSLT processor will
understand this notation, the XML parser will not. See also 11.1.4 Namespace
Aliasing which describes how to use xsl:namespace-alias with these attributes.
Michael Kay
Saxonica
On 7 Feb 2017, at 17:15, Martin Holmes
gtxxgm-xsl-list-2(_at_)m(_dot_)gmane(_dot_)org
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> wrote:
Hi all,
I just hit a problem uploading what I thought was good XSLT 2.0 into
exist-db. This is what the problem looks like:
<xsl:variable name="xmlSource">
<div type="ajaxFragment" xml:id="{$thisId}" n="{$sortKey}">
<head><xsl:value-of select="$citationCaption"/></head>
[...]
<div>
</xsl:variable>
eXist's XML parser complains that the @xml:id is not a valid NCName, which of
course it's not, but I hadn't until now considered the possibility that is-id
constraints might apply to this kind of constructor in output content. Some
on the eXist list have suggested that this is invalid XSLT, but Saxon has
never complained about it and I can't actually find anything in the spec that
clearly says so. There's an obvious workaround using the more verbose
constructor, but I'd like to know whether this is in fact technically wrong
or not. What say you?
Cheers,
Martin
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