NISO Metasearch Initiative Collection Description Schema Summary

Introduction

Note: This document presents a summary view of the NISO MI CD schema. For full details, see the full description of the NISO MI Collection Description Schema [NISOMICD].

The NISO MI CD Schema is a Dublin Core Application Profile (DCAP). It is based closely on the Dublin Core Collection Description Application Profile (DC CD AP) [DCCDAP] which is being developed by the Dubin Core Collection Description Working Group.

This document describes:

The set of terms used in a class of DC metadata description sets. Specifically, it describes the set of terms used in:
- a description of a collection (i.e. a "collection-level description", or "unitary finding aid" in the terminology of the Analytical Model of Collections and their Catalogues [AMCC])
- a description of a "Subject Completeness Indicator" for a collection
While this DCAP permits the inclusion of descriptions of other related resources, it does not specify the properties and classes that may be referenced in descriptions of resources other than collections and Subject Completeness Indicators.
How the terms in this set are deployed in this class of DC metadata descriptions.
This includes requirements for the the occurrence of statements using a specified property, constraints on the types of value which are referenced in a statement using a specified property (vocabulary encoding schemes), and constraints on the datatypes of the value strings occurring in a statement using a specified property (syntax encoding schemes).

The terms description set, description, property, value, vocabulary encoding scheme, value representation, rich representation, value string, syntax encoding scheme, and related description are used in the sense they are used in the DCMI Abstract Model [DCAM].

The NISO MI CD Schema is not a description of an XML format. There may be multiple bindings of the NISO MI CD Schema to XML and to other syntaxes.

Vocabularies/Namespaces used in this DCAP

All references to properties and classes in DC metadata descriptions are made using URIs, In this document, Qualified Names of the form prefix ":" local-part are used as abbreviations for URIs which identify metadata terms. Prefixes are assumed to be associated with Namespace Names (URIs) as follows, and the corresponding URI for the term is constructed by concatenating the Namespace Name and the local-part:

Vocabulary Title	Namespace Name	Prefix
The Dublin Core Metadata Element Set, v1.1	http://purl.org/dc/elements/1.1/	dc
Dublin Core Terms	http://purl.org/dc/terms/	dcterms
Dublin Core Type Vocabulary	http://purl.org/dc/dcmitype/	dcmitype
MARC Relator Code Properties	http://www.loc.gov/loc.terms/relators/	marcrel
Collection-Level Description Terms	http://purl.org/cld/terms/	cld
Collection Type Vocabulary Terms	http://purl.org/cld/collection/type/	colltype
Collection Description Type Vocabulary Terms	http://purl.org/cld/colldesc/type/	colldesctype

Property Usage

Each main row in the two tables below describes how a specified property should be used in a statement within a DC metadata description.

Label: A short human-readable label that provides an indication of how the property is to be used in a NISO MI CD Schema description. The label does not appear in the description. It may be used to provide a descriptor for fields in displays of NISO MI CD Schema descriptions, but there is no requirement for display applications to use this label.
Property: A unique name/identifier for the property. It is presented as a Qualified Name, but is an abbreviation for a URI. This URI must be used to refer to the property in NISO MI CD Schema descriptions.
Usage in this DCAP: A description of how the definition of the property is to be applied in NISO MI CD Schema descriptions. This information supplements the definition of the property provided by its owner/maintenance agency.
Obligation: An indication of whether a statement using this property is required in a NISO MI CD Schema description. M = a statement using this property is required, OR = a statement using this property is optional but recommended, O = a statement using this property is optional
Vocabulary Encoding Scheme(s): The unique names/identifiers of classes from which values for the property should be drawn. Names are presented as Qualified Names, but are abbreviations for URIs. The URI must be used to refer to the class in NISO MI CD Schema descriptions. If no class is listed, then the NISO MI CD Schema does not specify a class from which values should be drawn. However the definition and usage of the property may determine that values of only certain types are appropriate. For example, the value of the dc:creator property must be an entity capable of action.
Value URI: An indication of whether a value URI is to be used in a statement using the property (and vocabulary encoding scheme, where specified). M = a value URI is required, O = a value URI is optional (see note), N = a value URI is not permitted
Value String: An indication of whether a value string is to be used in a statement using the property (and vocabulary encoding scheme, where specified). M = a value string is required, O = a value string is optional (see note), N = a value string is not permitted
Syntax Encoding Scheme(s): The unique names/identifiers of datatypes from which value strings for the property should be drawn. Names are presented as Qualified Names, but are abbreviations for URIs. The URI must be used to refer to the datatype in NISO MI CD Schema descriptions. If no datatype is listed, then the NISO MI CD Schema does not specify a datatype from which value strings should be drawn.
Rich Representation: An indication of whether a rich representation is to be used in a statement using the property (and vocabulary encoding scheme, where specified). M = a rich representation is required, O = a rich representation is optional (see note), N = a rich representation is not permitted
Related Description: An indication of whether a (related) description of the value is to be provided. M = a description is required, O = a description is optional (see note), N = a description is not permitted

Note: For each value, at least one of the following components must be present: a value URI, a rich representation, a value string or a (related) description.

Collection Properties

Label	Property	Usage in this DCAP	Obligation	Vocabulary Encoding Scheme(s)	Value URI	Value String	Rich Represent	Related Descrip
Collection Identifier	dc:identifier	A globally unique formal identifier for the collection.	OR	dcterms:URI	N	M	N	O
Title	dc:title	The name of the collection.	M		N	M	N	O
Alternative Title	dcterms:alternative (sub-property of dc:title)	Any form of name used as a substitute or alternative to the formal name of the collection	O		N	M	N	O
Description	dcterms:abstract (sub-property of dc:description)	A summary description of the content of the collection.	M		N	M	N	O
Size	dcterms:extent (sub-property of dc:format)	The size of the collection.	O		N	M	N	O
Language	dc:language	A language of the content of the items in the collection.	O	dcterms:ISO639-2	O	M	N	O
Collection Type	dc:type	A type of the collection.	O	cld:CollType	O	M	N	O
Collection Type	dc:type	A type of the collection.	O	cld:CollDescType	O	M	N	O
Rights	dc:rights	A statement of any rights held in/over the collection.	O		O	O	N	O
Access Rights	dcterms:accessRights (sub-property of dc:rights)	A statement of any access restrictions placed on the collection, including allowed users, charges, etc.	O		O	O	N	O
Accrual Method	dcterms:accrualMethod	The method by which items are added to the collection.	O	cld: DCCDAccrualMethod	O	M	N	O
Accrual Periodicity	dcterms:accrualPeriodicity	The frequency with which items are added to the collection.	O	cld: DCCDAccrualPeriodicity	O	M	N	O
Accrual Policy	dcterms:accrualPolicy	The policy governing the addition of items to the collection.	O	cld: DCCDAccrualPolicy	O	M	N	O
Custodial History	dcterms:provenance	A statement of any changes in ownership and custody of the collection that are significant for its authenticity, integrity and interpretation.	O		O	M	N	O
Audience	dcterms:audience	A class of entity for whom the collection is intended or useful.	O		O	M	N	O
Subject	dc:subject	A subject or topic associated with the items in the collection.	O	dcterms:DDC	O	M	N	O
				dcterms:LCC	O	M	N	O
				dcterms:LCSH	O	M	N	O
				dcterms:MESH	O	M	N	O
				dcterms:UDC	O	M	N	O
Spatial Coverage	dcterms:spatial (sub-property of dc:coverage)	The spatial coverage of the content of the items in the collection.	O		O	M	N	O
Temporal Coverage	dcterms:temporal (sub-property of dc:coverage)	The temporal coverage of the content of the items in the collection.	O		O	M	N	O
Accumulation Date Range	dcterms:created (sub-property of dc:date)	The range of dates over which the collection was accumulated.	O	cld:RKMS-ISO8601	O	M	N	O
Contents Date Range	cld:dateContentsCreated (sub-property of dc:date)	The range of dates over which the individual items within the collection were created	O	cld:RKMS-ISO8601	O	M	N	O
Relationship between the Collection and Subject Completeness Indicator
Subject Completeness	cld:subjectCompleteness	An indicator of the depth of a collection in relation to a subject field. In other words, subject completeness indicates how the number of items in the collection in a specified subject field compares with the total body of available items in that subject field.	O	cld:SCI	O	O	N	O
Relationships between the Collection and Agents
Collector	dc:creator	An entity who gathers (or gathered) the items in a collection together.	O		O	M	N	O
Owner	marcrel:OWN	An entity who has legal possession of the collection.	O		O	M	N	O
Relationship between Collection and Service
Is Accessed Via	cld:isAccessedVia (sub-property of dc:relation)	A service that provides access to the collection.	O		O	O	N	O
Relationships between Collections
Sub-collection	dcterms:hasPart (sub-property of dc:relation)	A second collection contained within the current collection.	O	dcmitype:Collection	O	O	N	O
Super-collection	dcterms:isPartOf (sub-property of dc:relation)	A second collection that contains the current collection.	O	dcmitype:Collection	O	O	N	O
Catalogue or collection description	dc:description	A second collection that describes the current collection (for example, the catalogue for the current collection).	O	dcmitype:Collection	O	O	N	O
Associated collection	dc:relation	A second collection that is associated with the current collection.	O	dcmitype:Collection	O	O	N	O
Relationships between the Collection and other resources
Associated publication	dcterms:isReferencedBy (sub-property of dc:relation)	A publication that is based on the use, study, or analysis of the collection.	O		O	O	N	O

Subject Completeness Indicator Properties

Label	Property	Usage in this DCAP	Obligation	Vocabulary Encoding Scheme(s)	Value URI	Value String	Syntax Encoding Scheme(s)	Rich Represent	Related Descrip
Completeness Subject	cld:completenessSubject	The subject area in which a level of completeness is indicated.	OR	dcterms:LCSH	O	M		N	O
Completeness Level	cld:completenessLevel	The level of completeness in the subject area indicated.	OR	cld:ConspectusLevel	O	M		N	O

References

[NISOMICD] NISO Metasearch Initiative Collection Description Schema
http://www.ukoln.ac.uk/metadata/nisomi/cd-schema/

[DCCDAP] Dublin Core Collection Description Application Profile
http://www.ukoln.ac.uk/metadata/dcmi/collection-application-profile/

[AMCC] Heaney, Michael. An Analytical Model of Collections and their Catalogues
http://www.ukoln.ac.uk/metadata/rslp/model/

[DCAM] Powell, Andy, Mikael Nilsson, Ambjörn Naeve, Pete Johnston. DCMI Abstract Model
http://dublincore.org/documents/abstract-model/

Changes made in this version

Remove gen:logo property.
Change name of cld:SubjectCompletenessIndicator class to cld:SCI.

Title:	NISO Metasearch Initiative Collection Description Schema Summary
Contributor:	Dublin Core Collection Description Working Group
Contributor:	NISO Metasearch Initiative Task Group 2
Date Issued:	2005-08-21
Identifier:	http://www.ukoln.ac.uk/metadata/nisomi/cd-schema-summary/2005-08-21/
Replaces:	http://www.ukoln.ac.uk/metadata/nisomi/cd-schema-summary/2005-08-16/
Is Replaced By:	Not applicable
Latest Version:	http://www.ukoln.ac.uk/metadata/nisomi/cd-schema-summary/
References:	http://www.ukoln.ac.uk/metadata/dcmi/collection-ap-summary/2005-08-21/
Status of Document:	This is a Working Draft of NISO Metasearch Initiative Task Group 2
Description of Document:	This document presents a summary of the draft schema for collection-level description developed by the NISO Metasearch Initiative Task Group 2. It is based closely on the Dublin Core Collection Description Application Profile, developed by the Dublin Core Collection Description Working Group.