Hi Satoru, thanks fort he information. Validation seems not to be strictly necessary (there are lots of higher level checks needed in any way). But it is good to known and I find [2] quite interesting.
All: I have checked some more of the features I need. There is the $IncludeConfig functionality. After reading up on XML, I thought to implement it via Xinclude, probably together with a custom URL handler. I think if I can not do it via Xinclude, I probably need to add a preprocessing stage that merges the config files. As far as I could see, expat does not support Xinclude while libxml does. I also find it interesting that James Clark says that libxml2 is available on "every modern Linux distro". Rainer > -----Original Message----- > From: [email protected] [mailto:rsyslog- > [email protected]] On Behalf Of Satoru SATOH > Sent: Tuesday, June 22, 2010 8:35 PM > To: rsyslog-users > Subject: Re: [rsyslog] any concerns about libxml > > If you want to validate XML config files [1], expat may not be an > option. Libxml2 supports validation of XML document with some schemas > including relax-ng [2] and it is much better than expat in this area. > > Personally, I prefer to use libxml2 to parse, dump XML files and > validate these with relax-ng schema for most cases and may choose > xqilla > if I need XQuery or XPath >= 2.0. > > > [1] This is one of the reasons to choose XML other than JSON / YAML, I > guess. > > Also, writing relax-ng schema document is not difficult and it's > also possible to use W3C XML schema datatypes to define custom > complex data types. > > [2] Libxml2 is listed in Software/validators in http://www.relaxng.org > and James Clark (original author of expat) mentioned about its > relax-ng support: > http://lists.oasis-open.org/archives/relax-ng/200303/msg00013.html > > - satoru > > On Tue, Jun 22, 2010 at 02:43:16PM +0200, Rainer Gerhards wrote: > > As a question related to the config issue: does anyone have concerns > about > > the libxml library? After what I have seen, it seems to be fairly > portable, > > stand-alone and widely used. But I have zero experience selecting XML > > toolkits, thus I ask... > > > > Rainer > _______________________________________________ > rsyslog mailing list > http://lists.adiscon.net/mailman/listinfo/rsyslog > http://www.rsyslog.com _______________________________________________ rsyslog mailing list http://lists.adiscon.net/mailman/listinfo/rsyslog http://www.rsyslog.com
