Using Tagged Encoded Length to support reversioning

The incoming message might contain a group that is no longer in use within the current ACORD AL3 standards, and has therefore been deleted from the later version of the standards. Similarly, the incoming bit stream might be from a later version of the ACORD AL3 standards, and might contain a new group that was not defined in earlier versions.

In order to correctly parse this self-defining tag, the TDS parser needs to know the length of the group it is parsing and skip to the end of all data associated with that self-defining tag.

Use the Data Element Separation method Tagged Encoded Length to handle these situations. You must also set these properties:

• Length of Tag or Tag Data Separator, so that the TDS parser knows where tags end.
• Length of Encoded Length, so that the TDS parser knows the size of the length field.
• Extra Chars in Encoded Length, are used to indicate to the TDS parser how many characters, apart from the data itself, are counted in the encoded length field.