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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

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

     //*[local-name()='element' 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::*[. =

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

Dimitre Novatchev
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