use the valid part of xml present in the broken xml

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hi how to use the valid part of an xml present inside a broken xml

Ex:

HTML

<nodea>
<nodeb>DATA</nodeb
<nodec> DATA </nodec>

at above since the nodea is not getting closed so this is a broken xml,but the nodeb & nodec are the valid Xmls present inside nodea. so can i retrive the data inside them or not using libxml2.

Posted 3-Apr-12 23:33pm

subrata kumar Nayak

Updated 3-Apr-12 23:53pm

Richard MacCutchan

v2

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Aescleal · Answer 1 · 2012-04-13T21:54:00

I don't know the specifics of libxml2 but if it's an event driven XML parser like expat then yes, it'll parse the data. If it's a DOM one it might but flag up an error while doing it.

Event driven parsers will work as they only read the document one tag at a time and call you back as they encounter it. So in your example you'll get a sequence of calls like:

- Hi, I'm opening nodea!
- Hi, I'm opening nodeb!
- Ooo, nodeb contains DATA
- Hi, I'm closing nodeb
- Hi, I'm opening nodec
- Ooo, nodec contains DATA
- Hi, I'm closing nodec
- err, I've finished processing and nodea hasn't been closed! Panic, world in flames!

A DOM parser on the other hand could say something like:

- I'm opening nodea, let's find the end of it
- Oh no! It's not there! I give up.

As I said I have no idea whether libxml2 can act as an event driven parser, but if it can't then try expat if you can use it in your project.

Cheers,

Ash

PS: Looks like libxml2 is a SAX (an informal standard for event parser) parser so it should be able to cope with incomplete XML.