TDS format: Data element separation

Data element separation defines how a TDS message is to be parsed.

Data element separation defines which method of identifying data elements is to be used and how the data elements are constructed. The different methods vary from full flexibility to fixed format, depending on how they are defined.

The four main types of data element separation are:

Fixed length types
Fixed length types are dependent on each element having a length. See TDS format: Fixed length separation types.
Tagged separation types
Tagged separation types are dependent on each element having tag prefix to identify it. See TDS format: Tagged separation types.
Delimited separation types
Delimited separation types use delimiters to identify the end of one data elements and the beginning of the next. See TDS format: Delimited separation types.
Data pattern types
Data pattern types use a regular expression to identify each element. See TDS format: Data pattern separation types.

There is a fifth category, which is different from the four described above:

Undefined separation types
Undefined separation types contain no data elements. They are applicable to embedded messages only, and should not be used for anything else. They use none of the TDS type-specific parameters other than Data Element Separation. See Multipart messages.
Related concepts
Multipart messages
TDS format: Fixed length separation types
TDS format: Tagged separation types
TDS format: Delimited separation types
TDS format: Data pattern separation types
TDS format: Message model integrity
Related tasks
Adding a TDS physical format
Configuring TDS properties: Message sets
Configuring TDS properties: Message model objects
Related reference
TDS message model integrity
TDS format physical properties for message model objects
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Copyright IBM Corporation 1999, 2009Copyright IBM Corporation 1999, 2009.
Last updated : 2009-01-07 15:20:47

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