Subject: RE: [xsl] Is this a sorting bug in xalan 6.4.0? From: "Roger Glover" <glover_roger@xxxxxxxxx> Date: Thu, 6 Feb 2003 23:51:17 -0600 |
Michael Kay wrote: > The XSLT 1.0 specification does not define the precise rules for > collating strings, in fact it makes it quite clear that the rules are > implementation-defined. That would seem to me to be a much more serious code portability issue than many I have seen discussed at length here and in the comments section of the latest 2.0 draft. > In real life, there are many different ways > people handle spaces and punctuation when compiling lists in > alphabetical order, and there is no right answer. Be that as it may, I have seen a fair number of systems that supported string ordering and/or sorting over my 20 years of programming, including SPSS, Fortran(66, 77, 90, and 95), C, C++, Objective C, Algol, Pascal, PostScript, SQL, Awk, Perl, Java, Python, Unix, Linux, Dos, Windows, Mac, VAX/VMS, VM/CMS, MVS/TSO, IBM JCL, Burroughs JCL, CandE, Cray COS JCL, and CTSS; this includes string data encoded as ASCII, EBCDIC, ISO Latin, or Unicode (usually in one UTS guise or another). Here are some observations relative to the sorting of strings containing spaces: o Almost every standard or semi-standard string sorting library/command/facility I have used sorts strings with spaces the way Saxon sorts them. o None of them sort strings with spaces the way Xalan sorts them without at least an option setting. o Most would not sort as Xalan sorts without significant tinkering with the input. I am sure there are lots of people here who can trump my experience handily, but is my expectation that spaces will be significant in string sorting, at least by default, really *that* parochial? -- Roger Glover glover_roger@xxxxxxxxx Stan Dyck wrote: ----- snip ----- > > I get... > > > > <!--Apache Software Foundation--><table> > > <tr> > > <td>A</td> > > </tr> > > <tr> > > <td>AAL</td> > > </tr> > > <tr> > > <td>Amanda</td> > > </tr> > > <tr> > > <td>A Maureen</td> > > </tr> > > <tr> > > <td>Amy</td> > > </tr> > > </table> > > > > ...using xalan, and (for example)... > > > > <!--SAXON 6.4.1 from Michael Kay--><table> > > <tr> > > <td>A</td> > > </tr> > > <tr> > > <td>A Maureen</td> > > </tr> > > <tr> > > <td>AAL</td> > > </tr> > > <tr> > > <td>Amanda</td> > > </tr> > > <tr> > > <td>Amy</td> > > </tr> > > </table> > > > > ...using saxon. It looks like xalan is removing the space between "A" > > and "Maureen", causing it to sort below Amanda. It looks like a bug to > > me, agreed? I couldn't find similar examples on either this list's > > archives or on xalan's bug list. XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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