Summary of Public Comments on DCAM (5 February to 5 March)
See also http://dublincore.org/architecturewiki/AMChanges (changes to be made on the basis of 2007 Public Comment)
"Abstractness"
Comment: Jon Mason, 2007-02-06 (1)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=8054
Proposal: Additional "primer"-style documentation may be needed.
Resolution: No change required to DCAM.
Documentation of Changes
Comment: Jon Mason, 2007-02-06 (2)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Pete Johnston
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1420
Proposal: Announcement of comment period provides details of changes.
Resolution: No change required to DCAM.
"Reference Model"
Comment: Jon Mason, 2007-02-06 (3, 4)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=8403
Proposal: Use "information model" (as defined by Wikipedia) instead of "reference model". DCAM-as-whole = information model, with three sub-models (each an information model).
Resolution: Change DCAM to use "information model" instead of "reference model".
Described resource
Comment: Jon Mason, 2007-02-06 (5, 10)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Pete Johnston, 2007-02-16
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=4935
Proposal: Change either label "described resource" or definition to avoid repetition of "described". Also change "Each described resource may be described using one or more property-value pairs" to "Each described resource is described using one or more property-value pairs"
Resolution:
Definition of metadata
Comment: Jon Mason, 2007-02-06 (6)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=8678
Proposal:
Resolution: No change required to DCAM.
Descriptions/Statements
Comment: Jon Mason, 2007-02-06 (7)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=2190
Proposal:
Resolution: No change required to DCAM.
Values
Comment: Jon Mason, 2007-02-06 (8, 11)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=2364
Pete Johnston, 2007-02-16
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=4455
Proposal:
Resolution: No change required to DCAM.
Description model, description set and description
Comment: Jon Mason, 2007-02-06 (9)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1318
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1989
Proposal: either:
-
we replace the caption "The DCMI description model" with "The DCMI description set model" and we replace "The abstract model of DC metadata descriptions" with "The abstract model of DC metadata description sets"; or
-
we replace the caption "The DCMI description model" with "The DCMI information structure model" and we replace "The abstract model of DC metadata description sets" with "The abstract model of DC information structures" (or some other similar term for a generic construct)
Resolution:
Multiple URIs per Resource
Comment: Douglas Campbell, 2007-02-07 (1, 2)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Pete Johnston, 2007-02-19
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=5108
Proposal:
Resolution: No change required to DCAM.
Rich Representations v Value Strings
Comment: Douglas Campbell, 2007-02-07 (3)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Pete Johnston, 2007-02-20
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=5241
Proposal: Consider adding language tag (but not SES) for rich representations
Resolution: Superceded by proposal to remove rich representation from description model?
Rich Representations and Value Strings as Resources
Comment: Douglas Campbell, 2007-02-07 (4)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=6422
Proposal:
Resolution: No change required to DCAM.
Vocabulary Encoding Schemes
Comment: Douglas Campbell, 2007-02-07 (5)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=6611
Proposal:
Resolution: No change required to DCAM.
DCAM and RDF
Comment: Douglas Campbell, 2007-02-07 (6)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=6795
Proposal:
Resolution: No change required to DCAM.
Definition of description set
Comment: Douglas Campbell, 2007-02-07 (7)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=2521
Proposal: Change definition of Description Set in glossary to read "a set of one or more descriptions, each of which describes a single resource".
Resolution: Change definition?
Definitions of has range and has domain
Comment: Douglas Campbell, 2007-02-07 (8, 9)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=6974
Proposal: Extend definition of "has domain" to include "It may useful to think of it as the opposite to "class (of the described resource) has property"."
Change definition of "has range" to "A relationship between a property and a class which indicates that when the property is part of a property/value pair, the corresponding value is always an instance of that class."
Resolution: Change definitions for has range/has domain
Definitions of property/value pair
Comment: Douglas Campbell, 2007-02-07 (10)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: None
Proposal:
Resolution:
Definition of SES
Comment: Douglas Campbell, 2007-02-07 (11)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=6974
Proposal:
Resolution: No change required to DCAM.
Resource URI
Comment: Douglas Campbell, 2007-02-07 (12)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=2701
Proposal: Change
"A description is made up of one or more statements (about one, and only one, described resource) and zero or one resource URI (a URI that identifies the described resource)."
to
"A description is made up of one or more statements (about one, and only one, described resource) and zero or one described resource URI (a URI that identifies the described resource)."
Resolution: Change text as proposed.
Document Structure
Comment: Douglas Campbell, 2007-02-07 (13)
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=1543
Reply: Pete Johnston, 2007-02-07
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=2880
Proposal: Add sub-headings/sub-sections to Section 2
Resolution: Add sub-headings/sub-sections as proposed
Monotonicity, Sources of Statements etc
Comment: Pete Johnston, 2007-02-09
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=3236
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=8981
Proposal:
Resolution: No change required to DCAM.
Rich Representation in RDF
Comment: Ivan Herman, 2007-02-13
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=3957
Reply: Pete Johnston, 2007-02-21
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=5524
Proposal:
Resolution: No change required to DCAM. Superceded by proposal to remove rich representation from description model?
Value Representation and Value URI, DCAM and ranges
Comment: Ivan Herman, 2007-02-13
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=4137
Reply: Mikael Nilsson, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=7911
(and subsequent messages)
Proposal:
Resolution: No change required to DCAM. But see also range/OWL-DL compatability discussion.
Vocabulary Encoding Schemes (Set of resources v set of concepts)
Comment: Joe Tennis, 2007-02-22
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=7142
Reply: Multiple replies by Andy, Mikael, Pete
Proposal:
Resolution: Unresolved.
Abstract Syntax Required
Comment: Alistair Miles, 2007-02-26
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=10720
Reply: Mikael Nilsson, 2007-02-26
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=11846
Proposal: Description model = abstract syntax. Define rules for merging description sets, rules for inferencing separately from DCAM.
Resolution: No change required to DCAM.
Indirection (Resources v URIs/References to Resources etc)
Comment: Thomas Fischer, 2007-02-26
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=12269
Reply: Mikael Nilsson, 2007-02-26
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=12486
Proposal:
Resolution: No change required to DCAM.
Comparing URIs
Comment: Thomas Fischer, 2007-02-27
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=12693
Reply: Mikael Nilsson, 2007-02-27
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=12854
Proposal: State that DCAM treats URIs in same way as RDF when comparing/merging?
Resolution: Add reference to RDF treatment of URIs?
VES and Rich Representations/Lang Tag v language property?
Comment: Thomas Fischer, 2007-02-27
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=14062
Reply: Pete Johnston, 2007-02-28
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0702&L=dc-architecture&P=14630
Proposal:
Resolution: No change required to DCAM.
Remove Rich Representations from Description Model
Comment: Mikael Nilsson, 2007-03-05
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0703&L=dc-architecture&P=491
Reply: Thomas Fischer, 2007-03-05
http://www.jiscmail.ac.uk/cgi-bin/webadmin?A2=ind0703&L=dc-architecture&P=814
Proposal: Remove rich representations from description model, allow XML Literals as value strings
Resolution: Remove rich representations from description model, allow XML Literals as value strings.
Justification: Representing rich representations usefully requires describing them as resources in their own rights, with MIME type, language, encoding, etc. From the one-to-one principle, it therefore follows that they are better treated as separate resources in the model, instead of making the part of a single statement. By consequence, the construct has been removed.
Literals as Values
Comment: Mikael Nilsson, telecon 2007-03-01
Reply:
Proposal: If property has range rdfs:Literal or subclass, then description model should restrict statement components available
Resolution: Unresolved