This glossary supports the following titles: SOA: Principles of Service Design (ISBN: 01323 44823, Prentice Hall) Service-Oriented Architecture: Concepts, Technology, and Design (ISBN: 0131858580, Prentice Hall) Service-Oriented Architecture: A Field Guide to Integrating XML & Web Services (ISBN: 0131 428985, Prentice Hall) For more information about this book series, visit: www.soabooks.com context data (context data type) Information that pertains to what has and is transpiring as part of a current service activity is referred to as context data. Examples of context data include: • the quantity of services currently participating in an activity • which services are currently active and which were active in the service activity • the duration of the service activity • how many instances of the activity are currently in execution • how much memory a service activity has and is currently consumer Context data is one of two context data types, the other being context rules. Context data types are of relevance to the application of the Service Statelessness design principle. See also: - Service Statelessness - active (primary state) - context (state information type) - context rules (context data type) - passive (primary state) - session (state information type) - stateful (primary state condition) - stateless (primary state condition)

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