Ulrich Keller <[EMAIL PROTECTED]> writes:
> I am trying to read a number of XML files using xmlTreeParse(). Unfortunately,
> some of them are malformed in a way that makes R crash. The problem is that
> closing tags are sometimes repeated like this:
>
> <tag>value1</tag><tag>value2</tag>some garbage</tag></tag><tag>value3</tag>
>
> I want to preprocess the contents of the XML file using gsub() before feeding
> them to xmlTreeParse() to clean them up, but I can't figure out how to do it.
> What I need is something that transforms the example above into:
>
> <tag>value1</tag><tag>value2</tag><tag>value3</tag>
>
> Some kind of "</tag>.*</tag>" that only matches if there is no "<tag>" in
> ".*".
>
> Thanks in advance for you ideas,
Hmm, there are things you just cannot do with RE's, and I suspect that
this is one of them. Something involving explicit splitting of the
strings might work, though. How's this for size?
> trim <-
function(x)paste(sub("</tag>.*","</tag>",x),collapse="<tag>")
> sapply(strsplit(x,"<tag>"),trim)
[1] "<tag>value1</tag><tag>value2</tag><tag>value3</tag>"
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