NEW ISSUE: Promoted component reference changes multiplicity by default

[Simon Nash <oasis@cjnash.com>]

TARGET: Assembly Model Specification

DESCRIPTION: Promoted component reference changes multiplicity by default

The default multiplicity for a composite reference is always 1..1,
even if the underlying promoted component reference(s) have some
other multiplicity.  This change to the reference multiplicity
is surprising and unintuitive.

PROPOSAL:

For the simple case of promoting a single reference or multiple
references with the same multiplicity, define the default
multiplicity of the composite reference to be the multiplicity
of the promoted component references.  For the more complex case
of promoting multiple component references with different
multiplicities, require the consposite reference to specify a
multiplicity explicitly.

The following change is proposed for the text in CD03:

On line 1439, replace:
  "The default value for the @multiplicity attribute is 1..1."

by the following:

  The default value for the @multiplicity attribute depends on the
  multiplicity of the promoted component reference or references.
   . If the composite reference promotes a single component reference,
     the default multiplicity of the composite reference is the same
     as the multiplicity of the promoted component reference.
   . If the composite reference promotes multiple component references
     with the same multiplicity, the default multiplicity of the
     composite reference is the same as the multiplicity of the
     promoted component references.
   . If the composite reference promotes multiple component references
     with different multiplicities, there is no default value for
     the @multiplicity attribute of the promoted component reference
     and a value for @multiplicity MUST be specified. [ASMxxxxx]