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CALCONNECT DOCUMENT CD 1104
Type:	   Report
Title:     Index to Calendaring and Scheduling Standards
Version:   2.0
Date:      2011-05-18
Status:    Published
Source:    CalConnect
This work is Copyright © 2012-2013 The Calendaring and Scheduling Consortium, and licensed under a Creative Commons Attribution 3.0 Unported License.

Index to Calendaring and Scheduling Standards


This page provides links, titles, and very brief abstracts of Calendaring and Calendaring-related (e.g. WebDAV, vCard) standards, specifications, and guides. The material is divided by category and subdivided in turn to base standards, additions and extensions, and work in progress. Entries are alphabetical by title within section. The material linked is largely but not entirely IETF and CalConnect.

We would appreciate additions and corrections to the list; please send any recommendations to Standards Recommendations to CalConnect.

This page last updated June 25, 2014

*This page will be updated periodically to reflect new material and changes of status, e.g. an internet draft becoming an RFC. Minor updates such as these changes will typically not be reflected in the version number or date of publication at the top but the "last updated" date will change.





General

An Introduction to Internet Calendaring
This CalConnect guide introduces internet calendaring and the major standards and specifications related to calendaring and scheduling.

Calendaring and Scheduling Glossary of Terms
A Glossary of Calendaring and Scheduling Terms, developed by CalConnect.

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iCalendar

Base Standards

Internet Calendaring and Scheduling Core Object Specification (iCalendar) RFC 5545
iCalendar is the core data schema for calendaring information. This is the new version and obsoletes RFC2445.

iCalendar Transport-Independent Interoperability Protocol (iTIP) - Scheduling Events, BusyTime, To-dos and Journal Entries RFC 5546
Specifies the mechanisms for calendaring event interchange between calendar servers. This is the new version and obsoletes RFC2446.

iCalendar Message-Based Interoperability Protocol (iMIP) RFC 6047
Specifies how to exchange calendaring data via e-mail. This is the new version and obsoletes RFC2447.

xCal: The XML format for iCalendar RFC 6321
This specification defines a format for representing iCalendar data in XML. More specifically, is to define an XML format that allows iCalendar data to be converted to XML, and then back to iCalendar, without losing any semantic meaning in the data. Anyone creating XML calendar data according to this specification will know that their data can be converted to a valid iCalendar representation as well.

Parameter Value Encoding in iCalendar and vCard RFC 6868
This specification defines an extension to iCalendar and vCard data formats to allow parameter values to include certain characters forbidden by the existing specifications.

jCal: The JSON Format for iCalendar
This specification defines "jCal", a JSON format for iCalendar data. The iCalendar data format is a text format for capturing and exchanging information normally stored within a calendaring and scheduling application, for example, tasks and events. JSON is a lightweight, text-based, language-independent data interchange format commonly used in Internet applications.

Additional and Extensions

CalWS-Rest RESTful Web Services Protocol for Calendaring
This document, developed by the XML Technical Committee, specifies a RESTful web services protocol for calendaring operations. This protocol has been contributed to OASIS WS-CALENDAR as a component of the WS-CALENDAR Specification under development by OASIS.

CalWS-SOAP SOAP Web Servicies Protocol for Calendaring
This document, developed by the XML Technical Committee, specifies a SOAP web services protocol for calendaring operations. This protocol has been contributed to OASIS WS-CALENDAR as a component of the WS-CALENDAR Specification under development by OASIS.

Freebusy Read URL
This proposal, developed by the Freebusy Technical Committee, defines a standardized form of Freebusy Read URL to improve interoperability between client and server implementations, while extending functionality and utility through the use of optional parameters.

hCalendar 1.0 microformat
hCalendar is a simple, open, distributed calendaring and events format, using a 1:1 representation of standard iCalendar (RFC2445) VEVENT properties and values in semantic HTML or XHTML.

IANA Registration of Enumservices for Internet Calendaring RFC 5333
This document registers Enumservices for Internet calendaring. Specifically, this document focuses on Enumservices for scheduling with iMIP (iCalendar Message-Based Interoperability Protocol) and for accessing Internet calendaring information with CalDAV (Calendaring Extensions to WebDAV).

Work in Progress

Calendar Availability
This document specifies a new iCalendar calendar component VAVAILABILITY that allows the publication of available and unavailable time periods associated with a calendar user. This component can be used in standard iCalendar free-busy lookups, including iTIP free-busy requests, to generate repeating blocks of available or busy time with exceptions as needed.

Event Publication Extensions to iCalendar
This specification introduces a number of new iCalendar properties which are of particular use for event publishers and in social networking.

Improved Support for Icalendar Relationships
This specification updates RELATED-TO and introduces new iCalendar properties LINK and RELATED-ID to allow better linking and grouping of iCalendar components and related data.

Internet Calendar Scheduling Protocol (iSchedule)
This document defines the Internet Calendar Scheduling Protocol (iSchedule), which is a binding from the iCalendar Transport- independent Interoperability Protocol (iTIP) to the Hypertext Transfer Protocol (HTTP) to enable interoperability between calendaring and scheduling systems over the Internet.

Masking existing meetings in iCalendar free busy requests
This document defines an extension to the iTIP calendar scheduling protocol to allow an organizer to have a specific event that may exist on an attendee's calendar ignored when the attendee calculates and returns their free-busy information after a request from the organizer.

New Properties for iCalendar
This document defines a set of new properties for iCalendar data.

Schema for representing resources for calendaring and scheduling services
This specification describes a schema for representing resources for calendaring and scheduling. A resource in the scheduling context is any shared entity that can be scheduled by a calendar user, but does not control its own attendance status.

VALARM Extensions for iCalendar
This document defines a set of extensions to the iCalendar VALARM component to enhance use of alarms and improve interoperability between clients and servers.

VPOLL: Consensus Scheduling Component for iCalendar
This specification introduces a new iCalendar component which allows for consensus scheduling, that is voting on a number of alternative meeting or task alternatives.

Non-Gregorian Recurrence Rules in iCalendar
This document defines how non-Gregorian recurrence rules can be specified in iCalendar data.

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CalDAV

Base Standards

Calendaring Extensions to WebDAV (CalDAV) RFC 4791
This document defines extensions to the Web Distributed Authoring and Versioning (WebDAV) protocol to specify a standard way of accessing, managing, and sharing calendaring and scheduling information based on the iCalendar format. This document defines the "calendar-access" feature of CalDAV.

Scheduling Extensions to CalDAV RFC 6638
This document defines extensions to the Calendaring Extensions to WebDAV (CalDAV) "calendar-access" feature to specify a standard way of performing scheduling operations with iCalendar-based calendar components. This document defines the "calendar-auto-schedule" feature of CalDAV.

Additional and Extensions

Locating CalDAV and CardDAV Services RFC 6764
This specification describes how DNS SRV records, DNS TXT records and well-known URIs can be used together or separately to locate Calendaring Extensions to WebDAV (CalDAV) or vCard Extensions to WebDAV (CardDAV) services.

Work in Progress

CalDAV: Calendar User Notifications
This specification defines an extension to CalDAV that allows the server to provide notifications to calendar users.

CalDAV Managed Attachments
This document defines how CalDAV servers can provide server managed collections to allow attachments associated with iCalendar data, to be stored and managed on the server.

CalDAV: Timezones by Reference
This document defines an extension to the CalDAV calendar access protocol to allow clients and servers to exchange iCalendar data without the need to send full timezone data.

Calendar Collection Entity Tag (CTag) in CalDAV
This specification defines an extension to CalDAV that provides a fast way for a client to determine whether the contents of a calendar collection may have changed.

Calendar User Proxy Functionality in CalDAV
This specification defines an extension to CalDAV that makes it easy for clients to setup and manage calendar user proxies, using the WebDAV Access Control List extension as a basis.

Collected Extensions to CalDAV
This document defines a set of extensions to the CalDAV calendar access protocol.

Shared and Published Calendars in CalDAV
This specification defines an extension to CalDAV that enables the sharing of calendars between users on a CalDAV server.

Also see Webdav

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vCard

Base Standards

vCard Format Specification RFC 6350
This document defines the vCard data format for representing and exchanging a variety of information about individuals and other entities (e.g., formatted and structured name and delivery addresses, email address, multiple telephone numbers, photograph, logo, audio clips, etc.). This is the new version and obsoletes RFCs 2425, 2426, and 4770, and updates RFC 2739.

xCard: vCard XML Representation RFC 6351
This document defines the XML schema of the vCard data format.

vCard KIND:application RFC 6473
This document defines a value of "application" for the vCard KIND property so that vCards can be used to represent software applications.

vCard Format Extensions : place of birth, place and date of death RFC 6474
The base vCard 4.0 specification defines a large number of properties, including date of birth. This specification adds three new properties to vCard 4.0, for place of birth, place of death, and date of death.

vCard Format extension : represent vCard extensions defined by the Open Mobile Alliance (OMA) Converged Address Book (CAB) group RFC 6715
This document defines extensions to the vCard data format for representing and exchanging certain contact information. The properties covered here have been defined by the Open Mobile Alliance Converged Address Book group, in order to synchronize, using OMA Data Synchronization, important contact fields that were not already defined in the base vCard 4.0 specification.

vCard KIND:device RFC 6869
This document defines a value of "device" for the vCard KIND property so that the vCard format can be used to represent computing devices such as appliances, computers, or network elements (e.g., a server, router, switch, printer, sensor, or phone).

Parameter Value Encoding in iCalendar and vCard RFC 6868
This specification defines an extension to iCalendar and vCard data formats to allow parameter values to include certain characters forbidden by the existing specifications.

jCard: The JSON format for vCard RFC 7095
This specification defines "jCard", a JSON format for vCard data.

Additions and Extensions

Calendar Attributes for vCard and LDAP RFC 2739
This memo defines three mechanisms for obtaining a URI to a user's calendar and free/busy time. These include manual transfer of the information, personal data exchange using the vCard format, and directory lookup using the LDAP protocol.

hCard 1.0 microformat
hCard is a simple, open, distributed format for representing people, companies, organizations, and places, using a 1:1 representation of vCard (RFC2426) properties and values in semantic HTML or XHTML.

Work in Progress

vCard Service Type Parameter
This document defines a "Service Type" parameter for use on various vCard properties to help clients distinguish between different types of communication services that may be using the same protocol, yet are distinct.

vCard Format Extension : To Represent the Social Network Information of an Individual
This document defines an extension to the vCard data format for representing and exchanging a variety of social network information.

Registration of vCard VERSION Property Values
This document registers the existing vCard VERSION property values with IANA and contains some provisions on its generic syntax and use.

vCard representation of resources for calendaring and scheduling services
This specification describes the vCard representation of resources for calendaring and scheduling. A resource in the scheduling context is any shared entity that can be scheduled by a calendar user, but does not control its own attendance status.

Objectclass property for vCard
This specification describes a new property for vCard Format Specification (RFC6350) to allow the specification of objectclasses.

Schedulable Objectclass for vCard
This specification describes a new property objectclass value for the vCard object class property defined in draft-vcard-objectclass allowing schedulable entities to be marked as such.

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CardDAV

Base Standards

CardDAV: vCard Extensions to Web Distributed Authoring and Versioning (WebDAV) RFC 6352
This document defines extensions to the Web Distributed Authoring and Versioning (WebDAV) protocol to specify a standard way of accessing, managing, and sharing contact information based on the vCard format.

Additional and Extensions

Work in Progress

CardDAV Directory Gateway Extension
This document defines an extension to the vCard Extensions to WebDAV (CardDAV) protocol that allows a server to expose a directory as a read-only address book collection.

Also see Webdav

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WebDAV

Base Standards

HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) RFC 4918
Web Distributed Authoring and Versioning (WebDAV) consists of a set of methods, headers, and content-types ancillary to HTTP/1.1 for the management of resource properties, creation and management of resource collections, URL namespace manipulation, and resource locking (collision avoidance).

WebDAV Current Principal Extension RFC 5397
This specification defines a new WebDAV property that allows clients to quickly determine the principal corresponding to the current authenticated user.

Additional and Extensions

Binding Extensions to WebDAV RFC 4842
This specification defines bindings, and the BIND method for creating multiple bindings to the same resource. Creating a new binding to a resource causes at least one new URI to be mapped to that resource. Servers are required to ensure the integrity of any bindings that they allow to be created.

Collection Synchronization for WebDAV RFC 6578
This specification defines an extension to WebDAV that allows efficient synchronization of the contents of a WebDAV collection.

Extended MKCOL for Web Distributed Authoring and Versioning (WebDAV) RFC 5689
This specification extends the Web Distributed Authoring and Versioning (WebDAV) MKCOL (Make Collection) method to allow collections of arbitrary resourcetype to be created and to allow properties to be set at the same time.

Quota and Size Properties for Distributed Authoring and Versioning (DAV) Collections RFC 4331
This document discusses the properties and minor behaviors needed for clients to interoperate with quota (size) implementations on WebDAV repositories.

Using POST to Add Members to WebDAV Collectons RFC 5995
This specification defines a discovery mechanism through which servers can advertise support for POST requests with the aforementioned "add collection member" semantics.

Versioning Extensions to WebDAV RFC 3253
This document specifies a set of methods, headers, and resource types that define the WebDAV (Web Distributed Authoring and Versioning) versioning extensions to the HTTP/1.1 protocol.

Web Distributed Authoring and Versioning (WebDAV) SEARCH RFC 5323
This document specifies a set of methods, headers and properties composing WebDAV SEARCH, an application of the HTTP/1.1 protocol to efficiently search for DAV resources based upon a set of client- supplied criteria.

WebDAV Access Control Protocol RFC 3744
This specification extends the Web Distributed Authoring and Versioning (WebDAV) Protocol to support the server-side ordering of collection members.

WebDAV Current Principal Extension RFC 5397
This specification defines a new WebDAV property that allows clients to quickly determine the principal corresponding to the current authenticated user.

WebDAV Ordered Collections Protocol RFC 3648
This specification extends the Web Distributed Authoring and Versioning (WebDAV) Protocol to support the server-side ordering of collection members.

Work in Progress

Use of the Prefer Header Field in Web Distributed Authoring and Versioning (WebDAV)
This specification defines how the HTTP Prefer header can be used by a WebDAV client to request that certain behaviors be implemented by a server while constructing a response to a successful request.

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Related

Base Standards

Date and Time on the Internet: Timestamps RFC 3339
This document defines a date and time format for use in Internet protocols that is a profile of the ISO 8601 standard for representation of dates and times using the Gregorian calendar.

Procedures for Maintaining the Time Zone Database RFC 6557
Time zone information serves as a basic protocol element in protocols, such as the calendaring suite and DHCP. The Time Zone (TZ) Database specifies the indices used in various protocols, as well as their semantic meanings, for all localities throughout the world. This database has been meticulously maintained and distributed free of charge by a group of volunteers, coordinated by a single volunteer who is now planning to retire. This memo specifies procedures involved with maintenance of the TZ database and associated code, including how to submit proposed updates, how decisions for inclusion of those updates are made, and the selection of a designated expert by and for the time zone community. The intent of this memo is, to the extent possible, to document existing practice and provide a means to ease succession of the database maintainers.

Additional and Extensions

Work in Progress

Automated Service Configuration
This specification describes how clients can discover multiple services to configure themselves with a minimum of user-provided information, as short as possible sequence of queries and with a minimum of overhead for administrators of the services.

Portable Contacts
The Portable Contacts specification is designed to make it easier for developers to give their users a secure way to access the address books and friends lists they have built up all over the web. Specifically, it seeks to create a common access pattern and contact schema that any site can provide, well-specified authentication and access rules, standard libraries that can work with any site, and absolutely minimal complexity, with the lightest possible toolchain requirements for developers.

Timezone Service Protocol
This document defines a timezone service protocol that allows reliable, secure and fast delivery of timezone information to client systems such as calendaring and scheduling applications or operating systems.

Timezone XML Specification
This specification describes a format for describing timezone information for software and services.

WS-Calendar
WS-Calendar is an OASIS cross-domain standard for passing schedule and interval information between and within services

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Translation to Bulgarian: Please see http://www.fatcow.com/edu/calendaring-standards-bl/.


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