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Re: XPath 1.0 challenge: select all XML Schema element

Subject: Re: XPath 1.0 challenge: select all XML Schema element declarations with type string
From: "Dimitre Novatchev dnovatchev@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Sun, 19 Jul 2015 21:33:07 -0000
Re:  XPath 1.0 challenge: select all XML Schema element
I believe that in its most general form this problem doesn't have a
pure XPath 1.0 solution (though it is easy if we are allowed to use
XSLT 1.0).

We either need the feature of range variables, or the feature of being
able to specify a function call as the last location step in a path
expression.

Here is one XPath 2.0 expression (only the last line of the last
predicate uses XPath 2.0 (the call to name() in the ending location
step):


     //*[local-name()='element' and
namespace-uri()='http://www.w3.org/2001/XMLSchema'
       and
          (
           @type[. = 'string'
                 and (//namespace::*[. =
'http://www.w3.org/2001/XMLSchema' and not(name())])
         or translate(.,
'_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', '')=':'
                 and substring-after(., ':') = 'string'
                 and not(substring(.,1,1) = ':')
                 and substring-before(., ':') = //namespace::*[. =
'http://www.w3.org/2001/XMLSchema']/name()
                ]
          )
        ]

On Sun, Jul 19, 2015 at 12:58 PM, Costello, Roger L.
costello@xxxxxxxxx <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> Hi Folks,
>
> The following XPath expression returns all XML Schema element declarations with @type equal to xs:string:
>
>         //xs:element[@type = 'xs:string']
>
> However, that XPath assumes the schema file is written with a namespace prefix, like this:
>
>         <xs:element name="Test" type="xs:string" />
>
> But the schema file could have been written like this:
>
>         <element name="Test" type="string" />
>
> The above XPath expression would fail to return that element declaration.
>
> Is there a way -- in XPath 1.0 -- to write an XPath expression which returns all element declarations of type string?
>
> /Roger
> 



-- 
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
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To invent, you need a good imagination and a pile of junk
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To avoid situations in which you might make mistakes may be the
biggest mistake of all
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Quality means doing it right when no one is looking.
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You've achieved success in your field when you don't know whether what
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To achieve the impossible dream, try going to sleep.
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I finally figured out the only reason to be alive is to enjoy it.

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