[Artifact Identification Requirements] issues with artifactName metadata

Lines 328-329 of draft 15 state:

Each artifact MUST contain the ArtifactIdentifier as described in these
guidelines:
    artifactName: [descriptive name]

Why does the first line say "ArtifactIdentifier" and then call out the
label of the metadata as "artifactName"? I'm not sure if this data is
supposed to be a descriptive name (e.g. "Web Service Reliable Messaging
Protocol Core Specification") or an identifier (e.g.
"ws-reliablemessaging-v1.0-spec-wd-01.pdf"). Is there a typo here?

Lines 343-344 state:

Each artifact MUST contain an identifier defined by the TC that is a
DescriptiveName for the artifact.
    descriptiveName:[tcDefinedDescriptiveName]

Why should we have to specify a descriptive name if "artifactName" were
already a descriptive name?

Gilbert Pilz
Sr. Principal Technologist
Office of the CTO
BEA Systems, Inc.