Editing High Level Architecture (section)

===Datatypes===
The purpose of the datatype tables is to provide specifications of the datatypes used for attributes, parameters, dimensions, time representation, user supplied tag and synchronization points. There are six categories of datatypes, with a separate tabular format for each of them.

====Basic Data Representation Table====
The purpose of the basic data representation table is to provide binary representations for use in other tables. A number of predefined basic datatypes are provided in the HLA standard: HLAinteger16BE, HLAinteger32BE, HLAinteger64BE, HLAfloat32BE, HLAfloat64BE, HLAoctetPairBE, HLAinteger16LE, HLAinteger32LE, HLAinteger64LE, HLAfloat32LE, HLAfloat64LE, HLAoctetPairLE and HLAoctet. The set of basic datatypes is usually not extended with user defined basic datatypes.

====Simple Datatypes Table====
[[File:Sample HLA simple datatype table.png|thumb|Sample HLA simple datatype table]]
The purpose of the simple datatypes table is to describe simple scalar data items. A number of predefined simple datatypes are provided in the HLA standard: HLAASCIIchar, HLAunicodeChar, HLAbyte, HLAinteger64time and HLAfloat64time. It is common to include user defined simple datatypes in a FOM.

====Enumerated Datatypes Table====
[[File:Sample HLA enumerated datatype table.png|thumb|Sample HLA enumerated datatype table]]
The purpose of the enumerated datatypes table is to describe data elements that can take on a finite discrete set of values. One predefined enumerated datatype is provided in the standard: HLAboolean. It is common to include user defined enumerated datatypes in a FOM.

====Array Datatypes Table====
[[File:Sample HLA array datatype table.png|thumb|Sample HLA array datatype table]]
The purpose of the enumerated datatypes table is to describe arrays of data elements (simple, enumerated, arrays, fixed records or variant records). A number of predefined simple datatypes are provided in the HLA standard: HLAASCIIstring, HLAunicodeString, HLAopaqueData and HLAtoken. It is common to include user defined array datatypes in a FOM.

====Fixed Record Datatypes Table====
[[File:Sample HLA fixed record datatype table.png|thumb|Sample HLA fixed record datatype table]]
The purpose of the fixed record datatypes table is to describe records with a fixed set of data elements (simple, enumerated, arrays, fixed records or variant records).

====Variant Record Datatypes Table====
The purpose of the variant record datatypes table is to describe records that may contain different, predefined sets of data elements. The different sets are called Alternatives. Which alternative that applies for a given variant record is indicated by a data element called the Discriminant.