Re: [gentoo-project] Call for Agenda Items -- Council Meeting 2016-02-14

["Robin H. Johnson" <robbat2@gentoo.org>]

Several of these questions were already answered in the #gentoo-infra
chat that predated the mailing list discussion; I repeat the details
here because it dispels the other concerns.

On Tue, Feb 02, 2016 at 10:11:40PM +0100, Ulrich Mueller wrote:
> > I'd vote for XML-Schema as well, but if there are good transforms
> > available, i'll live with RNG.
> Conversion from RNG/RNC to XML-Schema can be done with app-text/trang,
> for example. The question (which I had asked in -dev a few days ago)
> is if there is a conversion tool for the opposite direction:
Is Trang still actively maintained by upstream? Last release looks like
2009? It also cannot convert FROM XML-Schema, only TO XML-Schema.
There is also MSV, dev-java/msv, with a last release in 2013.

> >>>>> On Wed, 27 Jan 2016, Ulrich Mueller wrote:
> > Emacs nXML mode supports only RNC. Do we have a tool (i.e. a package
> > in the tree) for automatic conversion from XML Schema to RNC?
> Since nobody has replied to this, I suppose that we have no such tool?
> That would be a strong argument for RNG as the source format.
All you need is xsltproc, which is part of libxslt/libxml.

XSL transform: XSD -> RNG
https://github.com/epiasini/xsdtorng

XSL Transform: XSD -> DTD
http://bsp.mits.ch/code/xslt/zxsd2dtd
http://crism.maden.org/consulting/pub/xsl/xsd2dtd.xsl
These two are very similar, differing only in a comment block warning
that some RNG/XML-Schema constraints cannot be represented in DTD.

Both Trang and MSV are also Java, whereas the XSLT transforms are usable
without Java.

-- 
Robin Hugh Johnson
Gentoo Linux: Developer, Infrastructure Lead, Foundation Trustee
E-Mail     : robbat2@gentoo.org
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