Xpath - Extract Element Attribute values when it contains other Elements

Question

Hi new to Xpath and hoping this makes sense...

Only interested in a specific element and its attribute values... the issue I'm running into is this element contains nested elements.

Please note: TASK is not the Root element...

Here's an example:

     <TASK CHAPNBR="00" FUNC="000" PGBLKNBR="0" SECTNBR="00" SEQ="000" SUBJNBR="00" PGBRK="NO">
        <EFFECT/>
        <TITLE>Aircraft Pre-Dock</TITLE>
        <TOPIC PGBRK="NO">
           <EFFECT/>
           <TITLE>Aircraft Exterior walk around GVI from Ground Level.</TITLE>
           <SUBTASK CHAPNBR="00" FUNC="000" PGBLKNBR="0" SECTNBR="00" SEQ="000" SUBJNBR="00" PGBRK="NO">
              <LIST1>
                 <L1ITEM PGBRK="NO">
                    <PARA>Radome and Fuselage</PARA>
                 </L1ITEM>

Only interested in the TASK element and its attributes... so need the Xpath to return this string no matter what the attribute values

    <TASK CHAPNBR="00" FUNC="000" PGBLKNBR="0" SECTNBR="00" SEQ="000" SUBJNBR="00" PGBRK="NO">

Thank you for any assistance! :)

Is it always the same set of attributes? Xpath doesn't automatically format the result as XML, but you can use concat() with string literals... — DrWatson, Sep 23 '15 at 19:58

score 0 · Accepted Answer · answered Sep 23 '15 at 20:10

0

It would probably be something along the lines of

concat('<TASK CHAPNBR="', //TASK/@CHAPNBR, '" FUNC="', //TASK/@FUNC, '" etc. >')

and so on. This assumes that you only have one TASK element, and the set of attributes you need to retrieve is always the same.

answered Sep 23 '15 at 20:10

DrWatson

418
3
9

Thank you for the information... receiving this error message in BaseX 7.7 - "Attributes cannot be serialized"... – R.Bowe Sep 24 '15 at 12:47
See http://stackoverflow.com/questions/24663393/basex-attributes-cannot-be-serialized – DrWatson Sep 24 '15 at 13:35

Xpath - Extract Element Attribute values when it contains other Elements

1 Answers1