RP 2203 - Trailer Tracking Interface Standard: Introduction: Conventions: Notes

In the RP 2203 TTIS syntax, each tag is either an element or an aggregate. Data follows an element tag and is terminated by a matching tag (prefixed with a "/"). An aggregate tag begins a compound tag sequence and also ends with a matching tag. An aggregate can contain multiple aggregates and/or multiple elements.

RP 2203 does not require any white space between tags. White space following a tag delimiter (>), following an element value, or preceding a tag delimiter (<) is ignored. White space within an element value (i.e. anywhere between the first and last non-white space characters) is significant. For example, the following three are equivalent:

Conventions used in the tag descriptions are:

• Required tags are in bold.  Regular face indicates tags that are optional.
• Required and/or optional tags occur once unless otherwise noted in the description.
• A-n  or N-n  specify values that are of an alphanumeric or numeric type value, where n  indicates the maximum size. The numeric type is only used to represent whole, positive integers.
• Common value types, such as date/time, are referenced by name (such as datetime  ).
• Explanatory information is in italics. 
• Element attributes are not used in this standard. For instance, the following construct is not used: