Registration Opens for CalConnect XXX at AOL in Dulles, Virginia – May 19-23 2014

Registration is now open and hotel reservations are available for CalConnect XXX in Dulles, Virginia, May 19-23, 2014. The logistics page is located at and contains hotel booking information, locations, meeting venue, travel information, etc.

Our meeting venue is AOL’s Steve Crane Center at 22000 AOL Way, about 2 miles from Dulles International Airport.

The Doubletree Sterling/Dulles Airport is our Conference Hotel. The hotel is about 4 miles from the airport, and runs a 24-hour shuttle between the airport and the hotel which also stops at AOL. Booking at our rate is done through AOL Travel Services; information is available via the logistics page links above.

As always, the first half of the week will be an Interoperability Test Event and the last half, starting Wednesday with lunch, will be the CalConnect Conference. In addition to the regular Technical Committee sessions and possible BOFs we expect to have report-outs from the Contacts Sharing Provisional Committee and the FSC (Federated Shared Calendar) Ad Hoc/Provisional Committee.

We are pleased to announce that there will be a special Workshop on the VA Scheduling System on Wednesday afternoon during the Conference, open to the public by registration and to all participants at the Interoperability Test Event and the Conference.

In late 2012, The U.S. Veterans Administration announced a “prize contest” to “…encourage creation of systems that help Veterans make appointments to receive outpatient and ambulatory care from the Veterans Health Administration.” and to ultimately “…to replace the current Medical Scheduling Package (MSP) with a scheduling product which is a standards-based, modular, extensible and scalable, …”

Recently, the winning proposals were announced. One of the winning teams has accepted our invitation to attend, and to present at, the workshop.

The workshop is to discuss health care scheduling requirements, especially in the context of the Veterans’ Administration Scheduling System challenge, to examine possible changes or additions to the standards and drafts to better support the scheduling for health care.

Please contact us with any questions. We welcome observers and please note that you may register for the Workshop on Wednesday afternoon with no charge.

Observations from CalConnect XXIX in San Francisco

CalConnect held its twenty-ninth interoperability test event and Roundtable Technical Conference the week of February 3-7 in San Francisco, California. The event was hosted by CalConnect founding member Mozilla, which did a great job with not only the event logistics, but also making everyone feel very welcome, which was reflected in the very strong attendance at these events.

36 people, representing 21 CalConnect member organizations and one observer, participated during the week. Almost a quarter of the attendees traveled internationally to come to CalConnect XXIX, from the Czech Republic, England, France, Hong Kong, India, New Zealand and Switzerland. Attendance at CalConnect events is growing, international membership and participation are bringing new energy and perspectives to CalConnect.

We have just published the first architectural diagrams for Tasks from TC TASKS and for Calendaring and Scheduling from TC API.

Here’s what’s trending from CalConnect XXIX:

Trending – Membership

Six of the seven new “Emergent Vendor” members (a new membership category for small vendors and startups) were represented at CalConnect XXIX, including, our newest member.

Trending – Technical Committees (TC’s) and Provisional Committees (PC’s)

  • TC PUSH (PUSH protocol for CalDAV and CardDAV)
  • TC ISCHEDULE (intersystem iTIP scheduling via HTTP)
  • TC TASKS (VTODO extensions for new scheduling areas such as logistics, project and energy management)
  • TC API (Abstract API for Calendaring and Scheduling) was established from the provisional committee of the same name
  • TC FREEBUSY Demo-ed a prototype web client supporting VPOLL
  • A Contacts Sharing Provisional Committee was established to look at developing a single standard for Contacts Sharing

Trending – Interoperability testing

The interoperability testing was very successful, with 23 participants from 13 organizations. The CalDAV Test Suite is rapidly being evolved into a really useful general testing tool for CalDAV servers. A more detailed accounting of the interoperability testing will be available at CalConnect Interoperability Test Event Reports.

Trending – Documents/Standards

Much of the work in CalConnect is focused on specifications to become internet draft submissions to the IETF and ultimately be progressed to become RFCs (Proposed Standards), rather than be directly published by CalConnect itself.

Recently published CalConnect documents:

Calendaring Service Architecture
Task Architecture V0.4
Report on Roundtable XXIX
Report on Interoperability Test Event XXIX
7 Things You Should Know About Digital Travel Itineraries
7 Things You Should Know About Tasks

Recently updated internet drafts and published RFCs:

jCard: The JSON Format for vCard (RFC 7095)
Non-Gregorian Recurrence Rules in iCalendar
Support for iCalendar Relationships
jCal: The JSON format for iCalendar
Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)
CalDAV Managed Attachments
New Properties for iCalendar
Timezone Service Protocol
Calendar Availability (VAVAILABILITY)
Event Publishing Extensions to iCalendar

Trending – Organizationally

To facilitate broader understanding, CalConnect has retired the name “Roundtable” as used for its thrice-yearly conference and members’ meeting and will use the term “CalConnect Conference” or “Conference” going forward. The term “Ad Hoc” to describe a short-term exploratory committee has been retired, and will be replaced by “Provisional Committee”.

Wrapping it all together

CalConnect wishes to again thank Mozilla for helping to make CalConnect XXIX such a productive and enjoyable week.

At our next event, CalConnect XXX, to be hosted by AOL in Dulles, Virginia in May, we are planning to hold a public workshop on the Medical Appointment Scheduling System Contest sponsored by the Veterans Administration, with participation from the VA and from the winning team in the contest. We expect this will be a half-day workshop available to the public (by registration) and will be publishing more information as it becomes available.

CalConnect Welcomes

CalConnect welcomes as a member of the Calendaring and Scheduling Consortium., based in Red Beach, New Zealand, offers server protocol software for java, catering for WebDAV, CalDAV and CardDAV.



As usual, Monday and Tuesday all day and Wednesday morning will be the CalConnect Interoperability Test Event; Wednesday afternoon, Thursday, and Friday will be the CalConnect Conference.

General Information:

Logistics information for this event may be found at including venue, travel, hotel, and other planning information. The session schedule is available; the agenda slots will be assigned and topical agendas will be posted closer to the event. The meeting venue will be at Mozilla’s San Francisco facility, 2 Harrison Street, San Francisco.

The Conference Hotel is the Shattuck Plaza Hotel in Berkeley; due to extremely expensive hotel prices in San Francisco, we will be using BART (Bay Area Rapid Transit system) to commute to and from San Francisco each morning and evening (the hotel is 1/2 block from a BART station; Mozilla is about a kilometer from a BART station). Please note that you need to book your via the link on the CalConnect logistics page for this event to receive the CalConnect rate. Also note that the room block ends as of 3 January 2014 – so if you are planning to come I encourage you to get your room reserved soon!

I also encourage you to register early as early registration helps us with event planning and logistics, in addition to restaurant reservations. (Please remember that you need not pay when you register; if desired you may wait until the event and pay by credit card.)

About the Conference:

The overall schedule for sessions has been set although the actual assignment of slots will be made next month. Early registration for the conference will be $350 through 17 January 2014, and $395 thereafter. Another reason to register early: you won’t forget and miss the early registration deadline. Please note that the early registration about applies so long as you register <= 17 January, even if you don't actually pay until the event.

In addition to our regular Technical Committee sessions, we will expect to receive the reports of several Ad Hoc Committees (short-term working groups) established to explore specific new areas of possible work, including Calendaring APIs, Federated Shared Calendars, and a generic PUSH facility for CalDAV. New Technical Committees for some or all of the new areas may be instantiated before or at this meeting.

About the Interoperability Test Event:

The information page for the Interoperability Test event is at Please see this page for the current list of areas we plan to test; it will be updated regularly as testing registrations and requests are received. In addition, participants may have other areas they wish to test and we will be happy to include them in our planning; the test event registration form provides a place to indicate what you want to test. n all cases at least two participating organizations must be interested in testing a particular area or scenario to form testing pairs.

We invite you to join us in San Francisco at Mozilla for CalConnect XXIX.

CalConnect Welcomes fruux and Stylite

CalConnect welcomes fruux GMBH and Stylite AG as members of The Calendaring and Scheduling Consortium.

fruux, based in Münster, Germany, offers a multi-platform, multi-device unified contacts/calendaring system. fruux is also behind sabre/dav, a popular open source implementation of WebDAV, CalDAV and CardDAV.

Stylite, based in Kirchheimbolanden, Germany, offers EGoupware, an open source team collaboration suite.

Is CalConnect Right for You? Are you Right for CalConnect?

Earlier this week, we welcomed Ribose as the newest CalConnect member, and our first member organization based in Asia. Including Ribose, five organizations have joined CalConnect since we announced our new membership fees and categories in April of this year.

In our conversations with Ribose’s leadership, we learned that Ribose had been aware of CalConnect for some time, but had previously assumed that CalConnect was just for the “really big players”.

CalConnect does need the “really big players”, however one might reasonably define them, for a number of reasons, but CalConnect cannot succeed, cannot meet its mission, with only the “really big players”, the “really small players”, or only the “really anything-else players”.

As we note on our “Why Join” page,

We are a partnership between vendors of calendaring & scheduling systems and tools, and users of those tools. Our membership includes some of the world’s largest software development organizations, as well as emergent vendors and startups, end user organizations, interested individuals, and research universities…

CalConnect’s success, and ultimately the success of our vision of interoperable calendaring & scheduling depend on broad, engaged, diverse, and informed participation by those organizations developing calendaring and scheduling products, and those organizations which are using calendaring and scheduling products.

“Why Join” is, of course, a marketing piece to entice you to join or learn more about CalConnect, but the quoted paragraphs are a genuine representation of what CalConnect believes and stands for. We expressed a similar sentiment in the aforementioned “new membership fees/categories posting” on the CalConnect blog,

Here is what we hope to accomplish with our new membership and interoperability event fees – increase diversity, geographic distribution, age, gender, and company size of our membership. This is essential to CalConnect and its mission.

Our membership includes some of the world’s largest software development organizations, as well as emergent vendors and startups, end user organizations, interested individuals, and research universities. Although there is some overlap, each of these membership categories has a different perspective, has different requirements and needs, and each can make a different contribution as a CalConnect member.

CalConnect is as close to a true meritocracy as any organization I have ever been involved with. Anyone, irrespective of membership category or company affiliation, can become a CalConnect thought leader, technical leader, or organizational leader, based on merit – your participation, your contributions, and your collegiality.

CalConnect is anchored in these precepts:

  1. CalConnect is a membership driven organization – multidimensional diversity, and broad, engaged participation are the keys to sustainability and maximum impact.
  2. CalConnect needs to influence the world, and CalConnect needs to be influenced by the world, not just its membership.
  3. The future of calendaring and the future of CalConnect are intertwined – CalConnect helps shape the future of calendaring, and the future of calendaring will surely shape CalConnect.

So, Is CalConnect Right for You? Are you Right for CalConnect?

If you are trying to solve a problem, find a solution, build a product, help drive the standards, or simply get to know the people driving calendaring & scheduling today, CalConnect is right for you.

If you are a large software development organization, an emergent software vendor or startup, if you are end user organization, a college or university, a government organization or department for which scheduling/calendaring is critical to your workflow or product line, if you are a standards organization which needs calendaring /scheduling expertise, or if you are an individual interested in calendaring /scheduling products or standards, you are right for CalConnect.

Gary Schwartz

CalConnect Welcomes Ribose

CalConnect welcomes Ribose as a member of The Calendaring and Scheduling Consortium. Ribose Inc, based in Hong Kong, offers a social collaboration platform for consumers.

CalConnect – The Calendaring and Scheduling Consortium – is returning to Europe for its third European event

Our first two European conferences, in 2011 and 2012, were very successful, and our European colleagues attendees encouraged us to return again this autumn. Therefore, CalConnect XXVIII will take place in Prague, Czech Republic, on September 23-27, 2013, hosted by DHL.

We encourage our European colleagues and others interested in Calendaring and Scheduling to join us. We’re working to make this event as attractive as possible to organizations that are not currently members but have thought about exploring CalConnect, and a European event is a chance for people to participate in a CalConnect event without having to incur the travel costs and time of coming to North America.

CalConnect is a collaboration between calendaring and scheduling vendors and users. It was established to further interoperability between calendaring and scheduling implementations, and works towards this purpose by driving the evolution of calendaring and scheduling standards through technical committee work, holding regular interoperability testing events, and hosting regular conferences, workshops and symposia focused on calendaring and scheduling.

European companies were among CalConnect’s earliest members members, and as standards and interoperability are both central to CalConnect’s mission and are strong core values of European Information Technology, we have long recognized the importance of increasing European involvement in CalConnect. To that end we held special events in Europe and 2007 and 2008 in preparation for our first regular CalConnect conference in Europe in 2011. This autumn’s event in Prague is one which we hope will continue with even greater European participation in CalConnect’s interoperable calendaring and scheduling projects.


Our venue will be the DHL facility in Prague, located at V Parku 2308/4117, Prague 4, 148 00, Czech Republic. The facility is a 5 minute walk from the Chodov metro station on Line C. All events of the CalConnect week, September 23-27, except for the Monday IOP test event dinner and the Thursday Roundtable dinner will take place at the DHL facility. Full information about the conference may be found at CalConnect XXVIII including the week’s schedules, registration, and logistics information including accommodation.

Monday, Tuesday, and Wednesday morning, September 23-25, will be our Interoperability Test Event, ending with lunch on Wednesday. Wednesday afternoon (beginning with lunch), Thursday, and Friday, September 25-27, will be the Technical Conference (Roundtable) which will include workshops, and technical committee sessions: briefings on what the CalConnect technical committees are doing, and discussions of problems, alternatives, and participation in the work of the Technical Committees.

Registration and Fees

You must register separately for the Interoperability Test Event and the Roundtable Technical Conference. Please see Registration and Fees for more information and registration forms.

Special Registration Fee for This Event: $600 U.S. per person for first-time non-members to cover both the Interoperability Test Event and the Roundtable Technical Conference.

We encourage you to register as soon as possible. Upon registration you will be invoiced for the amount due. However, you may choose to pay later, including at the event, if it is more convenient.

Conference Hotel

Our conference hotel is the Corinthia Hotel in Prague. We have a block of rooms and a special rate of 85 Euros/night exclusive of VAT. The special rate is available through 31 August. More information including a link to the booking form for this event may be found on the logistics page: .

Who and What is CalConnect?

We are a collaboration between calendaring and scheduling vendors and users, established to further interoperability between calendaring and scheduling implementations, and work towards this purpose by driving the evolution of calendaring and scheduling standards through technical committee work, holding regular interoperability testing events, and hosting regular conferences, workshops and symposia focused on calendaring and scheduling. See our current member list at CalConnect Members. Learn more about CalConnect at our website and our blog. You can find out more about membership in CalConnect at CalConnect Membership.

What is CalConnect currently focused on?

You may find brief descriptions of the current work items of our Technical Committees at Current Work.

Questions and Feedback:

Please contact us at with questions or feedback.

In particular, if you are interested in the Interoperability Test event and would like to suggest specific areas of testing, or potential participants, we want to know. If you have specific areas of interest or topics which you would like to see addressed in the workshops and symposia, please let us know about that as well! Also, feel free to send this e-mail on to others who you feel might be interested, or contact us and ask us to invite them as well.

You are also welcome to contact me directly with questions and suggestions; see my Signature block at the end of this E-mail

Please join us in Prague!

Dave Thewlis
Executive Director
The Calendaring and Scheduling Consortium


More Information:

More information about the test event, the technical conference, and the workshops may be found below. The schedule for the week may be viewed at CalConnect XXVIII Schedule. The entire set of logistics information, including travel, hotel booking, schedule, and as we get closer to the event, topical agendas and final topics for the workshops and symposia, may be viewed at CalConnect XXVIII.

Interoperability Testing

The Interoperability Testing will take place Monday and Tuesday, October 1-2, plus Wednesday morning the 3rd. Our interoperability test events offer those with calendaring implementations a chance to test against others one-on-one; the event is structured to allow “testing pairs” where you will get a chance to test with everyone in the course of event.

The exact testing scenarios will be decided based on who is coming and what (and with whom) they want to test. As of today we will definitely plan to test the following areas:

iCalendar/iMIP/iTIP and iMIP gateways
Autodiscovery protocol
CALSCALE (non-gregorian calendar recurrences via RRULE and RSCALE)
The new Timezone Service Protocol
CalWS, the Web Services protocol for calendaring**
If there is interest, synchronization testing for mobile clients in general

Please see CalConnect XXVIII IOP Test Event for more information.

**CalWS is being developed iin part to support of the WS Calendar specification from OASIS as part of the NIST Smart Grid initiative; however it is a general implementation of calendaring and scheduling operations via web services. CalWS testing is dependent upon at least two implementations participating.

Technical Workshops

Thursday and Friday mornings will be dedicated to workshops, which are included in the Roundtable Registration. We are currently planning workshops on Calendaring and Travel Itineraries, and on Federated Shared Calendars. Additional workshops may be offered.

The CalConnect XXVIII Schedule will be updated with the topics and speakers for the workshops as they are identified.

Roundtable (Technical Conference)

At each CalConnect event, the Roundtable offers an opportunity for each of the CalConnect Technical Committees to present its work, invite suggestions, and conduct open discussions with the attendees on issues or topics under deliberation in the technical committee. In order to facilitate people in North America joining the Roundtable portion of the week’s events, the Roundtable sessions will be held Wednesday, Thursday and Friday afternoons, as will be shown in the CalConnect XXVIII Schedule. The schedule includes

Opening and introduction to CalConnect
Report from the Interoperability Test Event
Technical Committee sessions for all CalConnect TCs
Opportunities for BOFs (“birds of a feather” discussions)
Final wrapup and summary of all Technical Committee sessions
CalConnect Plenary Session

The conference will conclude no later than 18:00 on Friday, October 5th.

Social Events:

There will be a dinner for all Interoperability Test Event participants on Monday Evening, a Reception on Wednesday evening for all participants in either the Test Event and/or the Technical Conference, and a dinner for all Technical Conference participants on Thursday evening.


Your registration to the Interoperability Test Event or the Roundtable Technical Conference includes lunch and morning and afternoon refreshments for the period of the event, plus the reception Wednesday evening. In addition, registration to the test event includes the Monday evening IOP test event dinner, and registration to the technical conference includes the Thursday evening Roundtable dinner. Please note that breakfast is not included as it is generally included with your hotel package.

CalConnect Welcomes Atlas

CalConnect welcomes Atlas as a member of The Calendaring and Scheduling Consortium. Atlas, headquartered in Santa Monica, California, develops scheduling applications for IOS and Android.

“Making Google’s CalDAV and CardDAV APIs available for everyone”

Google announced earlier this week an update, clarification and expansion of their earlier “spring cleaning” announcement about CalDAV. . Piotr Stanczyk, the blogger, is Google’s primary representative to CalConnect, as he mentioned in his blog, and is here this week at CalConnect XXVII at the University of Wisconsin.


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