From DAViCal Wiki
Up to release 0.5.x the development of DAViCal was largely following the needs of the publicly available client software. At that point there was fairly complete interoperability with the publicly available software at the time with support for CalDAV (Mulberry, Mozilla Calendar, Evolution and Chandler).
In later releases we have put some focus into ensuring that DAViCal communication is compliant with the relevant RFCs, regardless of whether the client software requires RFC compliance. In general, however, our intention is to pragmatically implement support for specification areas which are in actual use, prior to implementation of specification areas which might become used in the future.
From 0.9.8 there is significant advancement in spec implementation due to changes in the underlying structure for generating responses.
From 0.9.9 we are starting to move into a phase of implementing standards during their design phase, with the standards coverage of DAViCal now mostly exceeding what is used by common client software.
Related RFCs and Drafts
- RFC4791: CalDAV (Calendaring Extensions to WebDAV) (IETF Proposed Standard)
- CalDAV Scheduling Extensions to WebDAV (draft) (Internet-Draft, expires September, 2011)
- Defines the "calendar-schedule" feature of CalDAV.
- Changes from draft four are considerable (1)
- version 6 -> 7 changes are also significant, but hopefully this is close to the final one.
- In 0.9.9.1 we attempt to target an as-yet-unreleased -09 version of the draft which was received privately from the authors.
- RFC5546: iCalendar Transport-Independent Interoperability Protocol (iTIP) (IETF Proposed Standard)
- RFC3744: WebDAV Access Control Protocol (IETF Proposed Standard)
- RFC4918: WebDAV (IETF Proposed Standard)
- RFC5545: iCalendar (IETF Proposed Standard)
- RFC3253: Versioning Extensions to WebDAV (IETF Proposed Standard)
- S3.6 is referred to in RFC4791 S7.8
- The expand-property report and supported-report-set and supported-method-set properties are supported by DAViCal from 0.9.8 onwards.
- RFC4324 "Calendar Access Protocol" (Experimental Protocol)
- Similar to WCAP from Sun.
- RFC2616: HTTP 1.1 (Standards Track)
- RFC5397: WebDAV Current User Principal (IETF Proposed Standard) - supported from 0.9.6.2 onwards.
- RFC5689: Extended MKCOL for WebDAV (IETF Proposed Standard) - supported from 0.9.8 onwards.
- RFC6352: vCard Extensions to WebDAV (CardDAV) - Initial support towards -10 draft from 0.9.9.1
- CardDAV Directory Gateway Extension (Draft, not supported)
- RFC6578: Collection Synchronization for WebDAV - supported in various drafts from 0.9.8 onwards
- RFC5785: Defining Well-Known URIs (standards track) - supported for caldav/carddav URLs from 0.9.9.1
- Ticket-Based Access Control Extension to WebDAV (expired draft) - supported from 0.9.9 onwards.
- RFC5842: Binding extensions to WebDAV - supported from 0.9.9 onwards.
- RFC5323: WebDAV Search - not supported.
- RFC5995: Using POST to Add Members to WebDAV Collections - not supported.
- Timezone Service Protocol (draft) - supported from 0.9.9.6 onwards.
- Locating CalDAV and CardDAV services (draft) - supported from 0.9.9.1 onwards.
- New Properties for iCalendar (draft) - not specifically supported, but should generally be passed unchanged.
- CalDAV Extensions (draft) - not supported as at 0.9.9.7.
- CalDAV Managed Attachments (draft) - not supported as at 0.9.9.7.
- Microsoft 'Brief' header extension - supported at 1.0.2
There has been some effort to break down the elements of a number of these RFCs into a broader structure within this wiki. This is best seen by starting at the DAV page, which it is hoped will evolve to be the root of a hierarchy of useful interlinked documentation, and may ultimately replace this page.
Current Status of DAViCal Compliance
As at 0.9.9 significant parts of the CalDAV specification are supported, along with most of DAV (except COPY). Many elements of WebDAV access control are supported, especially with the new permissions structure which arrived in 0.9.8, but this area could still do with some more work. The scheduling extensions to CalDAV are now largely supported (they work with iCal3/iCal4, and at present no free-software clients support these extensions) and the draft is expected to be ratified within the next few months. WebDAV tickets and WebDAV Bindings are also supported in 0.9.9, and WebDAV Sync support was upgraded to the -03 draft at that release also.
Further detail may be in these occasionally maintained pages covering specific important RFCs: