Yes you do. All the regex engines I know are greedy. Besides regexs just being fussy, this is the main reason DFDL has a delimiter language that is it's own thing. Because the delimiters are specified in different places, not all together as in a regex. Hence the user has no opportunity to sort longest to shortest, so DFDL delimiters match all the possible delimiters that can appear at a point with longest match preferred.
Il Ven 5 Ago 2022, 1:54 PM Roger L Costello <coste...@mitre.org> ha scritto: > Hi Folks, > > Recall that when using dfdl:lengthPattern you must specify its regex > alternatives longest-to-shortest. For example, if you specify this: > > dfdl:lengthPattern="abc|abcd" > > then you will get a "left over data" error message. > > So you must sort the alternatives in longest-to-shortest order. That is a > hassle. > > The "-V limited" option changes things. It enables me to abandon > dfdl:lengthPattern and instead use the XSD pattern facet: > > <simpleType> > <restriction base="string"> > <pattern value="abc|abcd"/> > </restriction> > </simpleType> > > Question: Do I need to sort the pattern facet alternatives in > longest-to-shortest order? I am hoping the answer is "no". > > /Roger >
