RE: [xsl] Compound filter in for-each

["Michael Kay" <mike@xxxxxxxxxxxx>]

> .... but if I do this:
> 
> <xsl:for-each 
> select="Placemark/ExtendedData/Data[@name='rdb_status' and 
> value='Endangered']">
> 
> I get no error, but also no data returned -even though there 
> are matching values.

You haven't shown what you are doing inside the for-each - perhaps that's
where your error is.

How do you know you have now matched the values? What do you get for

count(Placemark/ExtendedData/Data[@name='rdb_status' and 
        value='Endangered'])

?
Michael Kay
http://www.saxonica.com/


> 
> 
> Alan Hale wrote:
> > Wendell Piez wrote:
> >> Alan,
> >>
> >> At 02:47 PM 3/24/2009, you wrote:
> >>> Still working on XML derived from Google Earth KML. I 
> want to filter on
> >>> particular ExtendedData/Data name and value combinations. 
> Here is an
> >>> extract of relevant XML:
> >>> <Placemark>
> >>> ..................
> >>> <ExtendedData>
> >>>          <Data name  "sciencName">
> >>>            <value>Euphrasia micrantha</value>
> >>>          </Data>
> >>>          <Data name  "grid_ref">
> >>>            <value>SN701822</value>
> >>>          </Data>
> >>>          <Data name  "eng_name">
> >>>            <value>An Eyebright</value>
> >>>          </Data>
> >>>          <Data name  "rdb_status">
> >>>            <value>Endangered</value>
> >>>          </Data>
> >>> .........................
> >>> </ExtendedData>
> >>> ............................
> >>> </Placemark>
> >>> So I guess what I am looking for is something like:
> >>> <xsl:for-each select  "Placemark/ExtendedData/Data[@name  
> >>> 'rdb_status'and value
> >>> 'Endangered']">
> >>> - though this doesn't work (in XML Notepad I just get the 
> unhelpful 
> >>> error message "Input string was not in a correct format.")
> >>
> >> You might want
> >>
> >> 
> select="Placemark/ExtendedData/Data[@name='rdb_status'][.='End
> angered']
> >>
> >> which is effectively the same as
> >>
> >> select="Placemark/ExtendedData/Data[@name='rdb_status' and 
> >> .='Endangered']
> >>
> >> But it's impossible to say absolutely without knowing more 
> about what 
> >> you haven't told us.
> >>
> >> The "." in that expression is short for XPath 
> "self::node()", which 
> >> is to say a reference to the context node. So 
> ".='Endangered'" is a 
> >> test for whether the context node of the evaluation (viz., 
> each Data 
> >> element selected by the path) has the string value "Endangered".
> >>
> >> Whether you use one predicate with an "and" operator to join your 
> >> tests, or two predicates, doesn't make any practical 
> difference here.
> > Many thanksWendell
> >
> > However I still get the same "Input string was not in a correct 
> > format" with XML Notepad, using either of your suggestions. 
> I'm sorry 
> > I did not give sufficient background information. Happy to provide 
> > more but I'm not clear what type of further info might be needed.
> >
> > I notice some "=" signs went missing in my XML example - I 
> guess you 
> > realised this. Should be like this of course:
> >
> > <Placemark>
> > ..................
> > <ExtendedData>
> >         <Data name = "sciencName">
> >           <value>Euphrasia micrantha</value>
> >         </Data>
> >         <Data name = "grid_ref">
> >           <value>SN701822</value>
> >         </Data>
> >         <Data name = "eng_name">
> >           <value>An Eyebright</value>
> >         </Data>
> >         <Data name = "rdb_status">
> >           <value>Endangered</value>
> >         </Data>
> > .........................
> > </ExtendedData>
> > ............................
> > </Placemark>