LEXICON Command
Reference Manual
User System Defined Attributes
User System Defined Attributes
A USDA (User System Defined Attribute) allows the administrator to place a behaviour on a standard AVEVA E3D™ element. For example limits may be applied to attributes of top level elements within AVEVA E3D™.
The hierarchy of elements which make up a USDA within the LEXICON database is shown below.
A USDA allows the administrator to add the following behaviour to system attributes:
1.
Set valid values
2.
Define limits
3.
Hide attributes on forms
4.
Category.
The valid values and limits may be varied with element type.
These values are defined by creating a USDA element in the dictionary database. A USDA element has the following attributes.
1974 to current year.
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