Referential constraint: prose text does not properly reflect case of optional principal

Rephrase last sentence in section 11.4 from In the example that follows, the category must exist for a product in that category to exist: to In the example that follows, the CategoryID of a Product entity must either be null or contain the ID of an existing category: Rephrase second sentence in first paragraph of section 11.6 from The entity on this end of the association may only exist if an entity on the opposite end of the association exists. to If the multiplicity of the principal association end is 1, the entity on the dependent end of the association may only exist if an entity on the principal end of the association exists. Accepted: https://www.oasis-open.org/apps/org/workgroup/odata/download.php/47722/latest/odata-meeting-18_on-20121213-minutes.html