I think regexs are a pain und would suggest the xml-light package for your purpose, which is the smallest xml library. (Or use take, drop, isPrefixOf and isSuffixOf to chop of your tags manually.) http://hackage.haskell.org/package/xml Cheers Christian Prelude Text.XML.Light> concatMap strContent . onlyElems $ parseXML "<tag>123</tag>" "123" Robert Ziemba wrote:
I have been working with the regular expression package (Text.Regex.Posix). My hope was to find a simple way to remove a pair of XML tags from a short string.
I have something like this "<tag>Data</tag>" and would like to extract 'Data'. There is only one tag pair, no nesting, and I know exactly what the tag is.
My first attempt was this:
"<tag>123</tag>" =~ "[^<tag>].+[^</tag>]"::String
result: "123"
Upon further experimenting I realized that it only works with more than 2 digits in 'Data'. I occured to me that my thinking on how this regular expression works was not correct - but I don't understand why it works at all for 3 or more digits.
Can anyone help me understand this result and perhaps suggest another strategy? Thank you.
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