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3.1.1.2.8 Write Restrictions

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Some tables do not support specific types of writes (add, update, or remove) or disallow writes altogether. The write operations that are supported by each table are specified in its definition.

Additionally, some tables have restrictions on which entries can be legally modified, based on properties such as the Changeable entry in the Conglomerations table. Where such restrictions exist for a table, they are specified in its definition.

Finally, some properties are read-only, even when the entry allows updates. Read-only properties for a table that otherwise allows updates are specified in the table definition.