View Attribute
A View Attribute can be also referred to as view characteristic or view field.
Creating & Editing View Attributes
To create a new View Attribute, click the "Create" button in the Attributes section of a View details page:
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A View Attribute must have:
- A unique and conformant name
- An Observable
- A Measurement
- A path
Name
The attribute's name must consist of letters, numbers, or underscores and start with a letter.
Observable/Measurement
The user can either start by selecting an Observable and then the Measurement - the Measurement list will be filtered to the Measurements realizing the selected Observable - or select the Measurement first which will automatically select the Observable the Measurement realizes.
Primitive
Once the Measurement is selected, the user needs to choose the attribute's primitive (this is later used to assert a Platform Type).
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Path
To add a path to the attribute, the user must add a semantic path using the path builder. The path is built hop by hop, starting with the entity/association attribute typing the selected observable.
Each hop must be committed by clicking the checkmark before being able to move to the next. A hop can be removed by clicking the x next to the new hop box.
After committing a hop, if there are additional hops that can be added, they will appear in the clickable list, otherwise the text "No Possible Options" will appear.
The current path of the attribute is rendered under the Path section title.
Creating & Editing Nesting View Attributes =
A Nesting View Attribute can either be a "Foreign Reference" or a "Privately Scoped" attribute. If the Private checkbox is checked, then the attribute is marked as "Privately Scoped" otherwise, it is marked as "Foreign Reference". New Nesting View Attribute defaults to Foreign Reference.
A Nesting View Attribute must point to a view with a uniform projected characteristic. The foreign referenced Nesting View Attribute's uniform projected characteristic must match the type of the last hop of the perspective path used by any field that nests it.
Note that when switching from a Nesting to a Composite View, the Path/Perspective attribute and the Private attribute are cleared on save.