Creator:	Dublin Core™ Collection Description Task Group
Date Issued:	2007-03-09
Identifier:	http://dublincore.org/specifications/dublin-core/collection-description/frequency/2007-03-09/
Replaces:	http://dublincore.org/specifications/dublin-core/collection-description/frequency/2006-08-24/
Is Replaced By:	Not applicable
Latest Version:	http://dublincore.org/specifications/dublin-core/collection-description/frequency/
Description of Document:	This document describes the frequency vocabulary used by the application profile for collection-level description developed by the Dublin Core™ Collection Description Task Group.

Introduction

The Collection Description Frequency Vocabulary provides a set of terms that can be used as values of the dcterms:accrualPeriodicity property in descriptions of collections. It has been developed in association with the Dublin Core™ Collections Application Profile (DC Collections AP)but this vocabulary is independent of that profile and the terms defined here may be referenced in other metadata descriptions and used as the values of other properties.

The Collection Description Frequency Vocabulary is based on the set of codes used for publication frequency in the MARC 21 Concise Format for Holdings Data.

In statements in DC metadata descriptions, the URIs of the individual terms may be used as value URIs and/or the labels of the terms may be used as value strings. The vocabulary encoding scheme URI is http://purl.org/cld/terms/Frequency.

A representation of the terms in this vocabulary is also available as an RDF/XML document.

Note

All references to properties, classes, vocabulary encoding schemes and syntax encoding schemes in DC metadata descriptions are made using URIs. In this document, Qualified Names of the form prefix ":" local-partare 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:

• dc: http:/purl.org/dc/elements/1.1/
• dcterms: http://purl.org/dc/terms/
• dcmitype: http://purl.org/dc/dcmitype/
• cld: http://purl.org/cld/terms/
• freq: http://purl.org/cld/freq/

Collection Description Frequency Vocabulary [cld:Frequency]

Identifier	http://purl.org/cld/terms/Frequency
Qualified Name	cld:Frequency
Defined By	Collection Description Terms Namespace http://purl.org/cld/terms/
Type of Term	Vocabulary Encoding Scheme
Label	Collection Description Frequency Vocabulary
Definition	A set of frequencies with which a repeatable event occurs.
Comments
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Vocabulary Terms

• Triennial [freq:triennial]
• Biennial [freq:biennial]
• Annual [freq:annual]
• Semiannual [freq:semiannual]
• Three times a year [freq:threeTimesAYear]
• Quarterly [freq:quarterly]
• Bimonthly [freq:bimonthly]
• Monthly [freq:monthly]
• Semimonthly [freq:semimonthly]
• Biweekly [freq:biweekly]
• Three times a month [freq:threeTimesAMonth]
• Weekly [freq:weekly]
• Semiweekly [freq:semiweekly]
• Three times a week [freq:threeTimesAWeek]
• Daily [freq:daily]
• Continuous [freq:continuous]
• Irregular [freq:irregular]

Triennial [freq:triennial]

Identifier	http://purl.org/cld/freq/triennial
Qualified Name	freq:triennial
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Triennial
Definition	The event occurs every three years.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Biennial [freq:biennial]

Identifier	http://purl.org/cld/freq/biennial
Qualified Name	freq:biennial
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Biennial
Definition	The event occurs every two years.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Annual [freq:annual]

Identifier	http://purl.org/cld/freq/annual
Qualified Name	freq:annual
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Annual
Definition	The event occurs once a year.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Semiannual [freq:semiannual]

Identifier	http://purl.org/cld/freq/semiannual
Qualified Name	freq:semiannual
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Semiannual
Definition	The event occurs twice a year.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Three times a year [freq:threeTimesAYear]

Identifier	http://purl.org/cld/freq/threeTimesAYear
Qualified Name	freq:threeTimesAYear
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Three times a year
Definition	The event occurs three times a year.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Quarterly [freq:quarterly]

Identifier	http://purl.org/cld/freq/quarterly
Qualified Name	freq:quarterly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Quarterly
Definition	The event occurs every three months.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Bimonthly [freq:bimonthly]

Identifier	http://purl.org/cld/freq/bimonthly
Qualified Name	freq:bimonthly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Bimonthly
Definition	The event occurs every two months.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Monthly [freq:monthly]

Identifier	http://purl.org/cld/freq/monthly
Qualified Name	freq:monthly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Monthly
Definition	The event occurs once a month.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Semimonthly [freq:semimonthly]

Identifier	http://purl.org/cld/freq/semimonthly
Qualified Name	freq:semimonthly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Semimonthly
Definition	The event occurs twice a month.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Biweekly [freq:biweekly]

Identifier	http://purl.org/cld/freq/biweekly
Qualified Name	freq:biweekly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Biweekly
Definition	The event occurs every two weeks.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Three times a month [freq:threeTimesAMonth]

Identifier	http://purl.org/cld/freq/threeTimesAMonth
Qualified Name	freq:threeTimesAMonth
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Three times a month
Definition	The event occurs three times a month.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Weekly [freq:weekly]

Identifier	http://purl.org/cld/freq/weekly
Qualified Name	freq:weekly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Weekly
Definition	The event occurs once a week.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Semiweekly [freq:semiweekly]

Identifier	http://purl.org/cld/freq/semiweekly
Qualified Name	freq:semiweekly
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Semiweekly
Definition	The event occurs twice a week.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Three times a week [freq:threeTimesAWeek]

Identifier	http://purl.org/cld/freq/threeTimesAWeek
Qualified Name	freq:threeTimesAWeek
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Three times a week
Definition	The event occurs three times a week.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Daily [freq:daily]

Identifier	http://purl.org/cld/freq/daily
Qualified Name	freq:daily
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Daily
Definition	The event occurs once a day.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Continuous [freq:continuous]

Identifier	http://purl.org/cld/freq/continuous
Qualified Name	freq:continuous
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Continuous
Definition	The event repeats without interruption.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Irregular [freq:irregular]

Identifier	http://purl.org/cld/freq/irregular
Qualified Name	freq:irregular
Defined By	Collection Description Frequency Namespace http://purl.org/cld/freq/
Type of Term	Vocabulary Term
Label	Irregular
Definition	The event occurs at uneven intervals.
Comments
Is Member Of	Collection Description Frequency Vocabulary http://purl.org/cld/terms/Frequency
See Also	MARC 21 Concise Holdings: Caption and Pattern Fields (853-855) http://www.loc.gov/marc/holdings/echdcapt.html

Changes made in this version

• Changed name of DC Collection Description Application Profile to DC Collections Application Profile