FIX.Latest_EP287 Field #320

Tag	Field Name	Abbr Name	Data Type	Union Datatype	Description	Pedigree
320	SecurityReqID	ReqID	String		Unique ID of a Security Definition Request.	Added FIX.4.2

Used in messages:

[DerivativeSecurityList][DerivativeSecurityListRequest][DerivativeSecurityListUpdateReport][SecurityDefinition][SecurityDefinitionRequest][SecurityDefinitionUpdateReport][SecurityList][SecurityListRequest][SecurityListUpdateReport][SecurityTypeRequest][SecurityTypes]