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Add new section 4.1.1.4 SML Reference Target The node set a non-null SML reference resolves to is its target. SML null references have no target. [Note: I worded the 1st sentence VERY carefully so it is consistent with 4.1.2.1 which (a) equates target to resolving the ref (b) allows a ref to resolve to >1 target element]. This definition is used in multiple sections that follow, including 4.3 which is now pretty distant. 4.1.2.1 At Most 1... remove "(or resolve to)" since this is now covered above. 4.1.2.3 Null References "A model validator MUST not attempt to..." This constraint also applies to deref() implementations, a wider scope.
4.3 Constraints on References Table 4-1. from "Used to constrain the name of the reference's target element." to "Used to constrain the name of the reference's target ." from "Used to constrain the type of the reference's target element." to "Used to constrain the type of the reference's target ." (ref target now defined in new "sml ref target" section)
change heading from "4.3.2 Constraints on Targets" to "4.3.2 Constraints on Reference Targets" (ref target now defined in new "sml ref target" section)
fixed. made all suggested changes except the following: instead of: "4.3.2 Constraints on Reference Targets" changed to : "4.3.2 Constraints on SML Reference Targets"