Schema Negotiation for Versioned Documents Transmitted in a Distributed Environment

摘要

In one embodiment, a scheme is disclosed for negotiating schema information relating to one or more content types of a message body comprised within a message of a communication protocol. A communication protocol message such as a SIP or HTTP message is generated by a sender towards a recipient, wherein the message includes a message body. A schema indicator is provided in the communication protocol message to indicate acceptability of variations of a content type of a message body or body part in a response from the recipient.