1

A method of version control for application message models, the method comprising:

establishing, on a message sending device, a sender message model, the sender message model specifying a message format for interpreting application messages, the sender message model comprising one or more sender field specifications, each sender field specification specifying a message field for storing data in an application message, each sender field specification comprising sender field characteristics;

calculating, by the message sending device, a sender version number for the sender message model in dependence upon the sender field characteristics of one or more of the sender field specifications of the sender message model;

creating, by the message sending device, an application message according to the sender message model; and

transmitting, by the message sending device to a message receiving device, the application message and the sender version number for the sender message model.

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2

The method of Claim 1 wherein sender field characteristics further comprise a field identifier, a field size, and a field type.

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3

The method of Claim 1 further comprising:

establishing, on a message receiving device, a receiver message model, the receiver message model specifying a message format for interpreting application messages, the receiver message model comprising one or more receiver field specifications, each receiver field specification specifying a message field for storing data in an application message, each receiver field specification comprising receiver field characteristics;

calculating, by the message receiving device, a receiver version number for the receiver message model in dependence upon the receiver field characteristics of one or more of the receiver field specifications of the receiver message model;

receiving, by the message receiving device from the message sending device, the application message and the sender version number for the sender message model;

comparing, by the message receiving device, the receiver version number with the sender version number; and

administering, by the message receiving device, the application message in dependence upon the comparison.

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4

The method of Claim 3 wherein:

the sender field characteristics of at least one sender field specification specify that a message field contains a constant value;

the receiver field characteristics of at least one receiver field specification also specifies that the message field contains the constant value;

creating, by the message sending device, an application message according to the sender message model further comprises creating the application message without the message field containing the constant value; and

administering, by the message receiving device, the application message in dependence upon the comparison further comprises retrieving the constant value from the receiver message model if the receiver version number matches the sender version number.

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5

The method of Claim 1 further comprising

establishing, on a message receiving device, a plurality of receiver message models, each receiver message model specifying a message format for interpreting application messages, each receiver message model comprising one or more receiver field specifications, each receiver field specification specifying a message field for storing data in an application message, each receiver field specification comprising receiver field characteristics;

calculating, by the message receiving device, a receiver version number for each receiver message model in dependence upon the receiver field characteristics of one or more of the receiver field specifications of the receiver message model;

receiving, by the message receiving device from the message sending device, the application message and the sender version number for the sender message model; and

selecting, by the message receiving device, one of the plurality of receiving message models for interpreting the application message in dependence upon the sender version number for the sender message model and the receiver version numbers for the receiver message models.

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6

The method of Claim 1 further comprising brokering, by a stream administration server, establishment of a message stream from the message sending device to the message receiving device.

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7

The method of Claim 1 wherein:

the message receiving device is a subscribing client device; and

the message sending device is a feed adapter having the capabilities of converting application messages on a feed adapter input stream having a first format to application messages on a feed adapter output stream having a second format and transmitting the application messages on the feed adapter output stream to subscribing client devices.

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8

The method of Claim 1 wherein the application message further comprises financial market data.

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9

A system for version control for application message models, the system comprising one or more computer processors, computer memory operatively coupled to the one or more computer processors, the computer memory having disposed within it computer program instructions capable of:

establishing, on a message sending device, a sender message model, the sender message model specifying a message format for interpreting application messages, the sender message model comprising one or more sender field specifications, each sender field specification specifying a message field for storing data in an application message, each sender field specification comprising sender field characteristics;

calculating, by the message sending device, a sender version number for the sender message model in dependence upon the sender field characteristics of one or more of the sender field specifications of the sender message model;

creating, by the message sending device, an application message according to the sender message model; and

transmitting, by the message sending device to a message receiving device, the application message and the sender version number for the sender message model.

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10

The system of Claim 9 further comprising computer program instructions capable of:

establishing, on a message receiving device, a receiver message model, the receiver message model specifying a message format for interpreting application messages, the receiver message model comprising one or more receiver field specifications, each receiver field specification specifying a message field for storing data in an application message, each receiver field specification comprising receiver field characteristics;

calculating, by the message receiving device, a receiver version number for the receiver message model in dependence upon the receiver field characteristics of one or more of the receiver field specifications of the receiver message model;

receiving, by the message receiving device from the message sending device, the application message and the sender version number for the sender message model;

comparing, by the message receiving device, the receiver version number with the sender version number; and

administering, by the message receiving device, the application message in dependence upon the comparison.

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