IBM-DM-030: Editorial comments

Minor editorial comments on Data Model document:

(a) Section 1 (Introduction), paragraph 5 reads in its entirety: "Every 
value in the data model is a sequence of zero or more items." It would be 
helpful to add, "Each item is either a node or an atomic value."

(b) Section 3 (Data Model Construction), paragraph 6, change "sequences of 
documents nodes" to "sequences of document nodes".

(c) Section 3.2 (Construction from an Infoset), last paragraph, change 
"Constructing and instance" to "Constructing an instance".

(d) Section 3.3 (Construction from a PSVI), first paragraph, change "any 
combination assessment modes" to "any combination of assessment modes".

(e) Section 3.3.2 (Mapping xsi:nil on Element Nodes), paragraph 3, change 
"then nilled property is true" to "then the nilled property is true".

(f) Section 3.3.4, Fix spelling of "Retrieving" in heading.

(g) Appendix D (Example): The example contains many lines that are too 
wide to print without truncation.