Supporting compatibility

A method performed by a first service producer, the method comprising:

• receiving a first message transmitted by a service consumer, wherein
• the first message comprises a header and a body,
• the body comprises a service request message, and
• the header comprises service consumer information comprising:
• i) first feature information that identifies a set of one or more features of a service provided by a second service producer that is supported by the service consumer and/or
• ii) first version information that identifies a version of an application programming interface (API) for the service provided by the second service producer that is supported by the service consumer.

A method performed by a second service producer, the method comprising:

• receiving a message transmitted by a first service producer, wherein
• the message comprises a header and a body,
• the body comprises a service request message, and
• the header comprises service consumer information comprising:
• i) feature information that identifies a set of one or more features of a service provided by the second service producer that is supported by the service consumer and/or
• ii) version information that identifies a version of an application programming interface (API) for the service provided by the second service producer that is supported by the service consumer.

A method performed by a service consumer, the method comprising:

• invoking a subscription service provided by a first service producer, wherein invoking the subscription service comprises:
• generating a service request message;
• and
• transmitting the service request message to the first service producer, wherein
• the service request message comprises an information element (IE) comprising service consumer information comprising:
• i) feature information that identifies a set of one or more features of a service provided by a second service producer that is supported by the service consumer and/or
• ii) version information that identifies a version of an application programming interface (API) for the service provided by the second service produce that is supported by the service consumer.

A method performed by a first service producer, the method comprising:

• receiving a service request message transmitted by a service consumer, wherein
• the service request message comprises an information element (IE) comprising service consumer information comprising:
• i) feature information that identifies a set of one or more features of a service provided by a second service producer that is supported by the service consumer and/or
• ii) version information that identifies a version of an application programming interface (API) for the service provided by the second service producer that is supported by the service consumer.