Implementer guidance

["Barker, Sean (UK)" <sean.barker@baesystems.com>]

I am resolving an issue on the implementer guidance for /IGNORE.

 Attribute values are set to '/IGNORE' when the information that could
be held by the attribute will be instead assigned to the instance of the
entity. Note: required attributes will always have an equivalent
assigned, whereas optional attributes need not be assigned.

While this describes how to populate instance diagrams, the question
arises, what happens in the physical file. That is, should an
unpopulated optional attribute contain the value "$" or "/IGNORE"?

Sean Barker
0117 302 8184


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