[Tclxml-devel] CVS Checkin

[Steve B. <Ste...@zv...>]

Dear All,

Just thought I'd give a "heads-up" on a couple of checkins to
the TclXML project CVS repository.  These are for the TclDOM
module.

Firstly, dom.tcl has been given improved support for XML Namespaces.
Specifically, serialisation of documents that contain XML Namespaces
should now work correctly (ie. prefixes will be added to element
names).  I don't think XML Namespace support is complete yet,
but this makes it more usable.

More significantly, there is now a new subdirectory 'src-libxml2'.
This contains an initial implementation of a Tcl wrapper for
the Gnome libxml2 library.  Early days yet: you can parse and
serialize a DOM document, get its document element and some
node attributes, such as nodeName.  Documents and nodes are wrapped
up in Tcl_Obj structures so that manipulating the tree from
Tcl is fast[*].

The eventual goal, of course, is to have this package completely
TclDOM compatible.  At the moment tcldom-libxml2 is a separate
implementation to the rest of TclDOM; I have yet to engineer the
package loading scripts so that one can choose between implementations.

The underlying goal for this work is to integrate it with
TclXSLT so that XSLT extensions written in Tcl will be able
to handle nodes and nodelists.

* In order to conserve memory I have not implemented a
token -> node mapping.  There is a token -> document mapping
since a typical application will not have many documents.
Since means that the app must keep a reference to the node.
Another thing I have avoided is creating a Tcl command for each
node.  This is what tDOM does.  I think doing so will cause
too much memory consumption, but I'm open to suggestions.
Does anyone desire compatibility with tDOM model?

Enjoy,
Steve Ball

-- 
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