CalConnect Administrative

CC/A 1902:2019
Report on CalConnect Conference XLV, June 3 - June 7, 2019
CalConnect Administrative




The Calendaring and Scheduling Consortium (“CalConnect”) is global non-profit organization with the aim to facilitate interoperability of technologies across user-centric systems and applications.

CalConnect works closely with liaison partners including international organizations such as ISO, OASIS and M3AAWG.

The procedures used to develop this document and those intended for its further maintenance are described in the CalConnect Directives.

In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the CalConnect Directives.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CalConnect shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the CalConnect list of patent declarations received (see

Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

This document was prepared by Technical Committee CHAIRS.


CalConnect XLV took place June 3-6, 2019, hosted by You Can Book Me in Bedford, United Kingdom. The conference was held on Google’s premises, and was attended by a total of 13 people from 7 member organizations, plus attendees to a joint virtual working group session with the IETF CALEXT working group. Friday morning, June 7, was also available as a working session for attendees.

The Conference focused on strategic and possible work items in addition to ongoing work, and finished with the CalConnect Plenary Session on Thursday. The schedule was rearranged during the week based on input from participants. The final pre-event Conference agenda with notes on the discussion topics may be found at CalConnect XLV Conference Schedule.

Report on CalConnect Conference XLV, June 3 - June 7, 2019

1.  Status of documents since last conference

Specifications in progress and not yet published are generally resident on GitHub either in our public or private areas.

1.1.  Documents at CalConnect

1.1.1.  Published

  • CC/DIR 1005:2019 Guidelines for the implementation of the CalConnect Patent Policy

  • CC/R 18003:2019 Calendar operator practices — Guidelines to protect against calendar abuse (TC CALSPAM)

  • CC/DIR 10001:2019 CalConnect Directive: Standardization and publication

  • CC/DIR 10002:2019 CalConnect Directive: Standard document requirements

  • CC/DIR 10003:2018 CalConnect Directive: Patent policy

1.1.2.  Committee Drafts

  • CC/CD 51003 Series in iCalendar

  • CC/CD 51004 iCalendar Relationships

  • CC/CD 51005 Calendar Subscription Upgrades

  • CC/CD 51006 Consensus scheduling — iCalendar vPoll component

1.1.3.  Documents at ISO

  • ISO/CC 19160-1 “Addressing — Digital addresses” in working draft at ISO/TC 211

  • ISO/CC 34000 “Date and time — Concepts and vocabulary” is under NWIP

1.2.  Documents at the IETF

1.2.1.  Published as Proposed Standard

  • CalDAV Managed Attachments RFC 8607

1.2.2.  Drafts in Final Review

  • Event Publishing Extensions to iCalendar (TC CALENDAR)

1.2.3.  Drafts in CALEXT Working Group Last Call

  • Improved Support for iCalendar Relationships (TC CALENDAR

  • JSCalendar: A JSON representation of Calendar data

1.2.4.  Assigned to CALEXT WG

  • CalDAV extension for scheduling controls

  • VLARM Extensions for iCalendar

  • Calendar Subscription Upgrades

1.2.5.  Pending Assignment to CALEXT WG

  • VPOLL: Consensus Scheduling Component for iCalendar

  • Support for Series in iCalendar

2.  CalConnect Liaisons as of February 04 2019

CalConnect has formal reciprocal membership liaisons with M3AAWG and OASIS and a strong working relationship with the IETF.

CalConnect has established formal Category A Liaisons with the ITU, and with the following ISO Committees:

3.  General status and items from Conference XLV

The Ad Hoc Committee on Rich Text (in Calendar events) formed at CalConnect XLIV completed its work and disbanded prior to CalConnect XLV.

A provisional Charter for a new TC USECASE was developed and will be completed this summer.

The Charter for TC LOCALIZATION is nearly complete and should be reviewed and adopted in the near future.

CalConnect has approved as revised the IPR and Copyright policies and will formally adopt them following this event.

Feedback on the new conference format is very positive and we will continue with this model.

TC PUSH has been reactivated to support movement of the specifications; the draft(s) will be updated and resubmitted.

TC-AUTODISCOVERY has been reactivated. A new draft will be published following the work on TC-PUSH.

4.  Detailed Session Notes

CalConnect Member Representatives should refer to the CalConnect XLV Conference Notes in the Conferences/CalConnect XLV folder on the CalConnect Document Repository for detailed session notes and information.

5.  Plenary meeting

CalConnect will hold two rather than three events in 2020: a spring event in April and an autumn event in late September/early October. Several participants noted that this would definitely help planning for an attending CalConnect events going forward.

Strong interest in using Zoom in place of regular conference calls for committee calls; will try with TCC and TC-DEVGUIDE calls following the event.

Joint Working Group meeting with IETF CALEXT was successful. Plan to do another in conjunction with CalConnect XLVI in October. Also plan on doing Working Group meeting with ISO/TC 154 working group.

Recommend referring to ourselves as “CalConnect” and not always add “The Calendaring and Scheduling Consortium” as the latter doesn’t reflect our full scope and future interests.

6.  Confirmed Future Events

7.  Pictures from CalConnect XLV

Pictures courtesy of Thomas Schäfer, 1&1.

Table 1