2.1.1623 Part 1 Section 21.4.3.2, cxn (Connection)

a.   The standard places no restrictions on the number of parents associated with a node.

Office requires that there be no more than one parent for any given node; for example, no more than one connection of type parOf or presParOf for any given destId.  As a result, destOrd is ignored.

b.   The standard states that the parTransId attribute is optional.

Office requires this attribute when the type attribute is set to parOf and ignores this attribute otherwise.

c.   The standard states that the presId attribute is optional.

Office requires this attribute when the type attribute is set to presOf and ignores this attribute otherwise.

d.   The standard states that the sibTransId attribute is optional.

Office requires this attribute when the type attribute is set to parOf and ignores this attribute otherwise.