>>>>> Jakub Wilk <jw...@debian.org> writes:
>>>>> * Ivan Shmakov <oneing...@gmail.com>, 2012-11-26, 14:32:
>> Seriously, XML takes a lot of concerns off an application
>> programmer. It provides quoting, arbitrary hierarchical structure,
>> support for different encodings, etc. Why, don't you think that
>> $ grep [[:lower:]]' FILE is ever supposed to work? For surely it
>> isn't: grep has no way to know the encoding of the input file, and
>> relies on the locale instead. On the contrary, XML allows for the
>> encoding to be specified explicitly via a processing instruction.
>> And then, there's XPath, which takes the input dataset structure
>> into account.
> How do you search for a lowercase letter in XPath?
With fn:matches (WHERE, "\p{Ll}")?
Specifically, if you're interested in all ENTRY elements, whose
respective KEY's contain a lower-case letter, it may look
something like the following:
//x:entry[fn:matches (x:key/text (), "\p{Ll}")]
For instance, using xqilla(1) (xmlstarlet(1) doesn't seem to
support fn:matches ()):
$ cat < cf.xml
<!DOCTYPE cf>
<cf xmlns="urn:uuid:95364fc4-e68d-492e-a122-7b3b37bdab10">
<entry>
<key>there be an all-lowercase key</key>
<value>all-lowercase key's value</value>
</entry>
<entry>
<key>THERE BE AN ALL-UPPERCASE KEY</key>
<value>all-uppercase key's value</value>
</entry>
<entry>
<key>There be a Mixed-case Key</key>
<value>mixed-case key's value</value>
</entry>
</cf>
$ xqilla -i cf.xml \
<(printf %s\\n '\
declare namespace x="urn:uuid:95364fc4-e68d-492e-a122-7b3b37bdab10";' \
'//x:entry[fn:matches (x:key/text (), "\p{Ll}")]')
<entry xmlns="urn:uuid:95364fc4-e68d-492e-a122-7b3b37bdab10">
<key>there be an all-lowercase key</key>
<value>all-lowercase key's value</value>
</entry>
<entry xmlns="urn:uuid:95364fc4-e68d-492e-a122-7b3b37bdab10">
<key>There be a Mixed-case Key</key>
<value>mixed-case key's value</value>
</entry>
$
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