MRM 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 MRM TDS format: Fixed-length separation types.
Tagged separation types
Tagged separation types are dependent on each element having tag prefix to identify it. See MRM 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 MRM TDS format: Delimited separation types.
Data pattern types
Data pattern types use a regular expression to identify each element. See MRM TDS format: Data pattern separation types.

There is a fifth category, which is different from the four described earlier in this topic:

Undefined separation types
Undefined separation types contain no data elements. They are applicable to embedded messages only. They use none of the TDS type-specific parameters other than Data Element Separation. See Message Sets: Multipart messages.