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Property Name



This property specifies the identifier for the product that created the iCalendar object.

Value Type


Property Parameters

IANA and non-standard property parameters can be specified on this property.


The property MUST be specified once in an iCalendar object.


The vendor of the implementation SHOULD assure that this is a globally unique identifier; using some technique such as an FPI value, as defined in [ISO.9070.1991].

This property SHOULD NOT be used to alter the interpretation of an iCalendar object beyond the semantics specified in this memo. For example, it is not to be used to further the understanding of non- standard properties.

Format Definition

This property is defined by the following notation:

 prodid     = "PRODID" pidparam ":" pidvalue CRLF

 pidparam   = *(";" other-param)

 pidvalue   = text
 ;Any text that describes the product and version
 ;and that is generally assured of being unique.


The following is an example of this property. It does not imply that English is the default language.

 PRODID:-//ABC Corporation//NONSGML My Product//EN

This document was automatically converted to XHTML using an RFC to HTML converter with the original text document at the Internet Engineering Task Force web site at .  The original text document should be referred to if there are any errors or discrepancies found in this document.

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The iCalendar Validator provides developers and testers a method to validate their iCalendar feeds, which can take data from either a URL, file or text snippet and compare it against the RFC 5545 specification.  We believe we have one of the best iCalendar validation tools available on the internet. More information about the validator can be found here.