[caldeveloper-l] XML schemas for WebDAV/CalDAV/CardDAV

[David Given]

I believe I've had the same experience as you with schema-based parsers via
jaxb for SOAP. Being able to use them for CalDAV would be great ---
type-safe automatic query parsing! I did try feeding the DTD from the
WebDAV RFC into xjc, at which point xjc crashed with an NPE...


On Sun, 3 Dec 2017 at 19:37 Michael Douglass <mikeadouglass at gmail.com>
wrote:

> I got into schemas for the calws stuff and at that time attempted to
> create xsd schemas for those protocols. I managed to do so for a small
> subsection of caldav (queries I believe) but my recollection (and it's
> going back a while so the details may be wrong) is that the xml structure
> violates some of the requirements for XSD. Elements can be simple or
> complex in these protocols. There are some elements that have a different
> definition depending on context etc.
>
> Having experienced the benefits of xsd in the jaxb world I'd have argued
> strongly for such schemas and a more formal approach to defining the
> protocols. I don't know if relaxng will have the same issues.
>
> Also some of my problems might have been some of the constraints applied
> by the soap world but I don't think that was so.
>
> On 12/1/17 10:50, David Given wrote:
>
> Hello,
>
> I'm aware that the DAV protocols aren't suitable for use with schema
> validators, due to the requirement to handle extension elements.
> Nevertheless, it would be really useful to have a definitive schema (either
> XSD or DTD) both for reference and as input for non-validating automation.
>
> The RFCs contain DTD fragments, but they're explicitly non-definitive and
> are there for documentation purposes only. And I don't really want to put
> together my own because then it'll be wrong. I've found some third party
> CalDAV schemas, all of which have comments saying that they're wrong, so I
> don't want to use those either.
>
> Does such a thing exist?
>
> Thanks!
>
>
>
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