Re: [xml] Streaming XPath Support

[Daniel Veillard <veillard redhat com>]

On Tue, Dec 19, 2006 at 11:01:45AM -0800, Stanley Poon (spoon) wrote:
> My understanding is that the current support is mainly for the Selector
> in XSD.

  right though we also use it to speed-up simple XPath queries

> Are there any plan to enhance the support for streaming Xpath such as
> //, *, simple predicates, etc.

  I take patches! Again that's something which Kasimier worked on
and a bit orphaned at this point.

> Also, is this internal feature added
> mainly for performance and for reducing memory usage?

  to be able to stream XSD validation without keeping trees around.

> Is the current implementation based on some finite state machine
> approach with some path sharing?

  based on automatas, see pattern.c in the sources.

Daniel

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