Philipp,
On 4/16/2011 2:37 PM, Philipp Kursawe wrote:
Thanks Wendell, I will try that! I think I have to go with the 1.0
version since Windows CE MSXML parser can only handle 1.0 expressions.
Sure. But if it were my code I wouldn't be traversing to //text each
time, but operating from some local context (probably the parent element
of the set of text siblings I am interested in).
If that doesn't make sense to you, maybe it's time to review some of the
literature on basic XPath. :-)
Cheers,
Wendell
Keep in mind, however, that what we have in XPath 1.0 "|" is a union
operation, not an "or". So,
//text[@id='color' and lang('en-us')] |
//text[@id='color' and lang('en')] |
//text[@id='color']
will get us all the nodes in //text that have @id='color', irrespective of
their lang() value, because the third term in the union collects them.
To do a cascading conditional like this in XPath 1.0 alone generally
requires building conditionals into the predicates, as in
//text[@id='color'][
@xml:lang='en-us' or
(@xml:lang='en' and not(../@xml:lang='en-us') or
not(../@xml:lang='en-us' or../@xml:lang='en')] ]
where the fallback cases (the second and third operands of the boolean 'or'
here) are excluded by filtering themselves out when the preferred cases are
available.
Here the attribute values are tested directly since the lang() function
works only on the context node, and we have to test the siblings. (So we
have to do without the case-insensitive test built into lang().)
This is easier in XPath 2.0, where we can do something like
//text[@id='color]/(.[lang('en-us')],.[lang('en')],.)[1]
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