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Limited Maximum Access Rule

The CSE applies the limited maximum access rule during extract processing. The rule only applies to objects in a child model.

When you extract a child model containing objects that are in checked out subsets, the maximum protection for those objects in the child model is limited by the protection granted them in the checked out subsets.

When a child model is extracted, the CSE enforces the same rules that protect objects against conflicting updates in multiple checked out subsets.

When an object in an extracted model is checked out with access protection, modify is the maximum protection granted that object when you check out the child model.

When objects in the parent model are checked out with Delete access, access in objects in the child model are limited to Read access.

When objects in the parent model are checked out with Modify access, access in objects in the child model are limited to Access.

When objects in the parent model are checked out with Access access, access in objects in the child model are limited to Modify access.

The limited maximum access rule that applies when you check out a subset of a child model, states that the CSE downgrades protection to the maximum access. The following list defines the specific access rules:

• When the requested protection is Delete, Modify, or Access, and the maximum protection access is Read access, the CSE downgrades the protection to Read.
• When the requested protection is Delete or Modify, and the maximum protection access is Access, the CSE downgrades the protection to Access.
• When the requested protection is Delete, and the maximum protection access is Modify, the CSE downgrades the protection to Modify.

If you check out the entire child model and it contains objects with access limited at the time of extract, you get those objects at the maximum possible protection level. That is, if maximum access is modify, the object is checked out with protection downgraded to modify.