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Collection of named orderings defined for the structure concept.

Structure concepts that extend other structure concepts inherit their named sort orderings.

A child structure that extends a parent structure inherits the parent sort orderings in the following way:

• If there is exactly one ordering for a given name in the parent structure(s), the child inherits the exact same ordering.
• If there are multiple ordering declarations for a given name in parent structures (as a structure can extend multiple structures), the child inherits a compound ordering (compound from all the orderings for the name) with that name.
• If the child structure defines a ordering with the same name as a ordering in the parent structure, it overwrites the ordering from the parent structure.

Structures that contain default-ordering are handled in the same way.

Example

structure {
 ...

  sort-orderings {
    default-ordering (EarliestArrival) {

      sorting (somePropertyExprOrBindingPath) {
        by (OtherOrderingOfSomePropertyExprStaticType)
      }

      sorting (somePropertyExprOrBindingPath) {
        by (AnotherOrderingOfSomePropertyExprStaticType)
        inverted
      }

      // default order used
      sorting (somePropertyExprOrBindingPath)

      // inverted default order used
      sorting (somePropertyExprOrBindingPath) {
        inverted
      }

    }

    ordering (LatestArrival) {
      ...
    }
    ...
  }
}