Re: [xml] Possible to get XHTML output from HTMLparser?

On Sat, Dec 20, 2008 at 12:25:57PM +0000, Martin (gzlist) wrote:
On 19/12/2008, R. Steven Rainwater <srainwater ncc com> wrote:
I'm using libxml2 for an application that generates XHTML output. I've
 recently needed to parse some nasty HTML tag soup input and incorporate
 it into some of my pages. Libxml2's HTMLparser does a great job of
 fixing up the bad HTML but it outputs HTML v4 markup. Is there any
 existing function that will output XHTML markup from the HTMLparser?

 ... I'm assuming I'd just need to walk the HTMLparser output
 tree, closing empty elements, expanding stand-alone attributes, and
 such. Looks like HTMLparser already fixes some things like making sure
 attribute values are quoted.

Those are serialisation details that the tree doesn't care about.

In libxml2 htmlDoc objects *are* xmlDoc objects, so if you just care
about well-formedness  any of the normal XML functions will do. Will
need to walk the tree to set the correct the namespace on all the
nodes however.

If you also care about validity according to a particular XHTML DTD,
you'd have to do considerable tree modifications to turn arbitrary tag
soup into something correct. Browsers have complex heuristics to, for
instance, make sanity out of form elements inside tables.

  As martin said. If you want the extra XHTML1 serailization rules
to be applied by the libxml2 serializer add the XHTML1 DTDs to the
document after parsing and before calling the saving function.
See 3.1.1 4/


Daniel Veillard      | libxml Gnome XML XSLT toolkit
daniel veillard com  | Rpmfind RPM search engine | virtualization library

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