Re: [bdbxml] Document names....

> Great - I was trying to figure out how to query for the name but  
> wasn't able
> to figure out the syntax - thanks!
>
> Any reason to use '{ string($a/@time) }' vs. '{ $a/@time/text() }' ??

There's quite a semantic difference between the string() function
and node/text().  The former returns the string value of the node  
(element
or attribute); the latter returns a sequence of all the child text  
nodes of the
node, which is not really what you are looking for, even though it often
works.

George

> Thanks again,
>     Mark
>
>
> On 6/30/05 3:22 PM, "George Feinberg" <[email protected]> wrote:
>
>
>>
>> Mark,
>>
>> An interesting question.
>> What's going on is that when you return constructed nodes,
>> as you are in the second case, they no longer
>> belong to the document from the container.
>> They belong to a constructed document, which has
>> no name.
>>
>> More in context, below...
>>
>>
>>> Howdy,
>>>     I want to know the names of the documents from which I'm getting
>>> results...
>>>     As long as there's no XML markup in my 'return' statement the
>>> name of
>>> the doc can easily be pulled from the Meta Information - however as
>>> soon as
>>> there's markup all of the Mea Info is lost.
>>>
>>> SO - using the perl API I do a:
>>>
>>>                 $container->putDocument($key, $file,  
>>> $update_context);
>>>
>>> & then later:
>>>
>>> for $a in (collection('junit_goto.dbxml')//testsuite)
>>> return
>>>          $a/@time/text()
>>>
>>> I can the fetch the $key of each document from which this value
>>> came via:
>>> $value->asDocument->getMetaData('http://www.sleepycat.com/2002/
>>> dbxml','name'
>>> , $val);
>>>
>>> Groovy!!
>>>
>>> HOWEVER as soon as I put markup in the return statement the 'name'
>>> meta-data
>>> info is lost:
>>>
>>>
>>> for $a in (collection('junit_goto.dbxml')//testsuite)
>>> return
>>> <time>
>>>         { $a/@time/text() }
>>> </time>
>>>
>>> Bummer!  Iterating thru the MetaDataIterator returns nothing.
>>>
>>> So how can I get the key/name of the providing XML doc with markup
>>> in the
>>> 'return' statement????
>>>
>>
>> You can only return one thing, so you have to figure
>> out how to put the name in the constructed information you are
>> returning.
>> First, you may want to use the syntax, "{string($a/@time)}" to get  
>> the
>> attribute value in the query above.
>>
>> You can probably add it as an attribute of your time element -  
>> something
>> like this:
>> for $a in (collection('junit_goto.dbxml')//testsuite)
>> let $name := dbxml:metadata('dbxml:name',$a)
>> return
>> <time docname='{$name}'>
>>          { string($a/@time) }
>> </time>
>>
>> You'll have noticed the way to get the document
>> name in the xquery expression.  Use it as you need.
>>
>> Regards,
>>
>> George
>>
>>
>>>
>>> Thanks!!
>>>     Mark
>>>
>>>
>>
>>
>
>
>
>
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