thanks a lot hans!
> Am 22.12.2016 um 18:30 schrieb Hans Hagen <pra...@wxs.nl>:
>
> On 12/22/2016 6:06 PM, Michael Eidenbenz wrote:
>> Hello
>>
>> I use the xml interface to list all publications that dont match a
>> search criteria:
>>
>> /field[@name='keywords'
>> and not (contains(text(),'alpha'))]
>>
>> but there are entries where the keywords field is missing.
>> how can I include them (here "test-3") in the output?
>>
>> Thanks Michael
>>
>> --------------------------
>>
>> \startbuffer[bib]
>>
>> @article{test-1,
>> title = {Article One},
>> author = {A. Foo and X. Bar},
>> year = {2001},
>> keywords = {alpha},
>> }
>>
>> @book{test-2,
>> title = {Book Two},
>> author = {B. Foo},
>> year = {2002},
>> keywords = {beta},
>> }
>>
>> @whatever{test-3,
>> title = {Book Three},
>> author = {C. Foo},
>> year = {2003},
>> }
>>
>> \stopbuffer
>>
>> \usebtxdataset [database] [bib.buffer]
>> \convertbtxdatasettoxml [database]
>>
>> \startxmlsetups btx:tag
>> \hbox{\xmlatt{#1}{tag}}
>> \stopxmlsetups
>>
>> \startxmlsetups btx:demo
>> \xmlfilter {#1} {
>> /bibtex
>> /*
>> /field[@name='keywords'
>> and not (contains(text(),'alpha'))]
>> /..
>> /command(btx:tag)
>> }
>> \stopxmlsetups
>>
>> \starttext
>> \xmlsetup{btx:database}{btx:demo}
>> \stoptext
>
> \startxmlsetups btx:demo
> \xmlfilter {#1} {/bibtex/*/command(btx:demo:action)}
> \stopxmlsetups
>
> \startxmlsetups btx:demo:action
> \xmldoifelse {#1} {/field[@name='keywords']} {
> \xmlfilter {#1} {
> /field[@name='keywords'
> and not contains(text(),'alpha')]
> /..
> /command(btx:tag)
> }
> } {
> \xmlsetup{#1}{btx:tag}
> }
> \stopxmlsetups
>
>
> -----------------------------------------------------------------
> Hans Hagen | PRAGMA ADE
> Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
> tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
> -----------------------------------------------------------------
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