Re: [xml] Constructing Regular Expression in libxml

[Daniel Veillard <veillard redhat com>]

On Thu, May 04, 2006 at 10:05:12AM +0100, srivatsan s wrote:
>   I want to know whether there is any way to construct a regular expression out of the schema (xsd) file . 

  basically no. If you have a pointer to solid litterature showing this
is even possible (attributes ? content ?) please pass the pointer
but in general I just think your request makes little sense.

>   some thing like this 
>   <xs:element name="parent">
>        <xs:complexType> 
>            <xs:sequence>
>                  <xs:element name ="child1"/>
>           </xs:sequence>
>      </xs:sequence.>
>   </xs:element>

  libxml compiles to element content to automatas, not to regexps,
those automatas have counters.
they don't have a regexp serialization form in general, that might be
doable, it may as well been unreadable (e.g. xs:all), and I don't see how
you would express rules about attributes, content, and namespaces.

Daniel
  
-- 
Daniel Veillard      | Red Hat http://redhat.com/
veillard redhat com  | libxml GNOME XML XSLT toolkit  http://xmlsoft.org/
http://veillard.com/ | Rpmfind RPM search engine http://rpmfind.net/