On 4/23/06, Daniel Walker <daniel.j.walker@gmail.com> wrote:
On 4/23/06, Sebastian Redl <sebastian.redl@getdesigned.at> wrote:
Daniel Walker wrote:
Actually, is the parser just an SGML parser?
XML is a subset of SGML. SGML is faaaar more complex.
That's what I said: "XML is a subset of SGML in the sense that SGML is less restrictive, so an SGML parser can accept XML files." My point is that we know property_tree doesn't have a full XML parser. Is it accepting files it should reject, rejecting files it should accept, is it closer to permisive SGML or restrictive XML?
Never mind. I knew there was a standard for SGML, but I hadn't really looked at it. It's completely impractical. I always thought SGML was basically just XML without balanced tags, namespaces and all the other XML features; i.e. a combination of HTML and XML without any keywords/semantics. I know lots of people who mark up data that way and call it SGML. That's similar to what property_tree expects: the only overt XML requirement is the <?xml ?> declaration. So, to me it was sounding more like SGML But yeah, you're right, writing a parser that supports ISO SGML would be a pain. Daniel Walker