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In this chapter the term OpenVMS API refers to the Reliable Transaction Router
for OpenVMS Version 2. The term Portable API refers to the API used in Reliable
Transaction Router for OpenVMS Version 3.
With RTR Version 3, the Portable API provides:
•
Portability over a wide range of language and machine environments
•
Simplified handling of concurrency, independent of the type of operating
system
•
Support for communication between machines with different hardware
representations of common data types
•
Interoperability with existing applications that use the OpenVMS API
•
Improved performance for commonly used transaction types
•
Support for use within a threaded environment
•
Support for foreign protocols such as XA and Microsoft DTC, with nested or
subtransaction transaction capability
6.1 Comparison of OpenVMS API and Portable API
Table 6–1 lists the OpenVMS API and comparable Portable API calls.
Running Version 2 Applications
Running Version 2 Applications 6–1
6
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