[lxml-dev] Problem with ":" char in tag names

[Stefan Behnel]

Ian Bicking wrote:
> Stefan Behnel wrote:
>>>> It's because of the ":" in the tag name.
>>> As another data point: by coincidence yesterday I saw a discussion of
>>> some other project who also ran into this problem.
>>>
>>> http://groups.google.com/group/html5lib-discuss/browse_thread/thread/9997a2468ab2b362
>>>
>>>
>>> No idea about the context there.
>>
>> Hmmm, I really wonder how many people used this 'feature' to work around
>> having to implement proper namespace support...
> 
> One of the places where this recently came up is that Facebook is using
> markup with fb:*: http://wiki.developers.facebook.com/index.php/FBML

No, they are not. They are using a well-defined namespace:

http://wiki.developers.facebook.com/index.php/FBML_DTD

If you use unnamespaced "fb:*" tag names here, you will also break validation
against their XSD.

Stefan