I wasn't questioning the desirability (from a client's perspective) of having a DIFF method, but was just pointing out that the challenge is to come up with a standard result format that more than one server will be willing/able to produce. Cheers, Geoff Werner wrote on 03/20/2006 08:24:55 AM: > Geoffrey M Clemm wrote: > > The only interesting thing about a DIFF method is the format of its result. > > There was such a wide variation in the different formats that diff tools > > use for different types of resources that it didn't appear to be something > > on which we could get consensus. There are some standards for diff formats, > > e.g., http://www.ietf.org/rfc/rfc3284.txt?number=3284 (The VCDIFF Generic > > Differencing and Compression Data Format) and some new ones being > > proposed, e.g., http://www.ietf.org/internet-drafts/draft-ietf-simple-xcap-diff-03.txt > > The diff calculation itself can require software that can't be distributed > to clients, because of licensing limitations, programming language, resources > or whatever. Note that it can be more than just a diff of text files. I > will use DeltaXML, for example, which is specialised in calculating the diff > between two XML documents. It inserts mark-up in its own namespace in the > resulting document. > > The format can also be converted on the fly, depending on the "Accept" > request header. I could convert it to PDF, again with tools that are only > available on the server. > > > Cheers, > > Geoff > > Regards, > > Werner. > > > > > Werner wrote on 03/20/2006 04:28:34 AM: > >> Shouldn't there be a DIFF method? Calculating the difference between > >> two versions may be a very specialised operation for some document > >> formats. The software or resources to accomplish it may not be available > >> to clients. > > -- > Werner Donné -- Re > Engelbeekstraat 8 > B-3300 Tienen > tel: (+32) 486 425803 e-mail: werner.donne@re.be >Received on Monday, 20 March 2006 13:37:44 UTC
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