xsl-list
[Top] [All Lists]

Re: [xsl] XPath 1.0 challenge: select all XML Schema element declarations with type string

2015-07-19 16:59:44
And here is a general example xsd schema on which to evaluate the
XPath 2.0 expression in the previous message:

<schema xmlns="http://www.w3.org/2001/XMLSchema";
xmlns:ab="http://www.w3.org/2001/XMLSchema";>
 <element name="shipto">
  <complexType>
   <sequence>
    <element name="name" type="string"/>
    <ab:element name="address" type="string"/>
    <element name="city" type="ab:string"/>
    <element name="country" type="string"/>
   </sequence>
  </complexType>
 </element>
</schema>

On Sun, Jul 19, 2015 at 2:32 PM, Dimitre Novatchev 
<dnovatchev(_at_)gmail(_dot_)com> wrote:
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(_at_)mitre(_dot_)org 
<xsl-list-service(_at_)lists(_dot_)mulberrytech(_dot_)com> 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.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
To avoid situations in which you might make mistakes may be the
biggest mistake of all
------------------------------------
Quality means doing it right when no one is looking.
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
-------------------------------------
To achieve the impossible dream, try going to sleep.
-------------------------------------
Facts do not cease to exist because they are ignored.
-------------------------------------
Typing monkeys will write all Shakespeare's works in 200yrs.Will they
write all patents, too? :)
-------------------------------------
Sanity is madness put to good use.
-------------------------------------
I finally figured out the only reason to be alive is to enjoy it.



-- 
Cheers,
Dimitre Novatchev
---------------------------------------
Truly great madness cannot be achieved without significant intelligence.
---------------------------------------
To invent, you need a good imagination and a pile of junk
-------------------------------------
Never fight an inanimate object
-------------------------------------
To avoid situations in which you might make mistakes may be the
biggest mistake of all
------------------------------------
Quality means doing it right when no one is looking.
-------------------------------------
You've achieved success in your field when you don't know whether what
you're doing is work or play
-------------------------------------
To achieve the impossible dream, try going to sleep.
-------------------------------------
Facts do not cease to exist because they are ignored.
-------------------------------------
Typing monkeys will write all Shakespeare's works in 200yrs.Will they
write all patents, too? :)
-------------------------------------
Sanity is madness put to good use.
-------------------------------------
I finally figured out the only reason to be alive is to enjoy it.
--~----------------------------------------------------------------
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
EasyUnsubscribe: http://lists.mulberrytech.com/unsub/xsl-list/1167547
or by email: xsl-list-unsub(_at_)lists(_dot_)mulberrytech(_dot_)com
--~--

<Prev in Thread] Current Thread [Next in Thread>