The Enumeration and Chronology of Periodicals Ontology (ECPO) defines the common bibliographic terms for the description of enumeration and chronology of periodicals.
Institutions like libraries normally describing their holdings of periodically issued media like journals, serials, annuals, newspapers etc. on a more abstract level than on a single unit level like they do it with books.
Holding descriptions of periodicals are more on the level of ranges of units. Ranges of periodical units are described by beginning and ending groups. Periodical units are commonly called “issues” mostly grouped into “volumes” but in both cases the caption and hierarchy depth may vary. There are more complex structures than this, like for instance Newspapers descriptions might have multiple subissues (e.g. one in the morning, another in the evening). This ontology is trying to cope this, but not all complex structures might be expressed.
It it also possible that the enumeration and chronology of periodicals is described in a itemized way. Itemized means that the enumeration and chronology of a periodical is described by a listing of each part of the unit held see ANSI/NISO Z39.71-2006 not using ranges.
A document using this ontology shall give answers to the questions:
A Question a document using this ontology might not answer:
This HTML document and RDF serializations of the Enumeration and Chronology of Periodicals Ontology ecpo.ttl in RDF/Turtle and ecpo.owl in RDF/XML) are generated automatically from a source file written in Pandoc Markdown syntax. Sources and updates are available at http://github.com/cklee/ecpo. The current version of this document was last modified at 2015-12-09 with revision 1adac19.
The current version of this ontology is a preliminary draft for open discussion. Feedback is welcome!
Revision history
The keywords “MUST”, “MUST NOT”, “REQUIRED”, “SHALL”, “SHALL NOT”, “SHOULD”, “SHOULD NOT”, “RECOMMENDED”, “MAY”, and “OPTIONAL” in this document are to be interpreted as described in RFC 2119.
The URI namespace of this ontology is http://purl.org/ontology/ecpo#. The namespace prefix ecpo is recommended. The URI of this ontology as a whole is http://purl.org/ontology/ecpo.
@prefix ecpo: <http://purl.org/ontology/ecpo#> .
@base <http://purl.org/ontology/ecpo> .The following namespace prefixes are used to refer to related ontologies:
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix vann: <http://purl.org/vocab/vann/> .
@prefix dc: <http://purl.org/dc/elements/1.1/> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .The Enumeration and Chronology of Periodicals Ontology (ECPO) is defined in RDF/Turtle as following:
<> a owl:Ontology ;
rdfs:label "Enumeration and Chronology of Periodicals Ontology"@en ;
rdfs:label "ECPO" ;
vann:preferredNamespacePrefix "ecpo" ;
vann:preferredNamespaceUri "http://purl.org/ontology/ecpo#" ;
dc:title "Enumeration and Chronology of Periodicals Ontology"@en ;
dc:description "Defines the common bibliographic terms for the description of enumeration and chronology of periodicals"@en .The following diagram illustrates the classes and properties defined in this ontology.
An Agent always holds a copy of a document called item. An item might have a Chronology which is related to other Chronologies via the property dct:hasPart. While current Chronologies should be instances of CurrentChronology, closed Chronologies should be instances of ClosedChronology.
While the property hasChronology states that the described units of the item are held by someone, the property hasChronologyGap states that the described units of the item are not held by someone.
In order to simply state that a Chronology is current or closed, one could easily relate an item with the individuals Current or Closed via the property hasChronology, because they are instances of CurrentChronology or ClosedChronology.
Chronologies as long as they describe ranges consist of either a beginning and an ending group or just of one beginning group. Beginning and ending groups are defined through the existence of the property hasBegin or one or more of its subproperties (for a beginning group) or the property hasEnd or one or more of its subproperties (for an ending group).
While instances of the class CurrentChronology must not make use hasEnd or the subproperties of hasEnd, instances of ClosedChronology must make use of hasEnd or one or more subproperties of hasEnd. All Instances of CurrentChronology or ClosedChronology must make use of hasBegin or one or more subproperties of hasBegin.
In cases of a itemized Chronologies which are neither current nor closed nor having a beginning or ending group, one should make use of the property hasItemized or one of its subproperties. To list multiple single items within a Chronology one must make use of the property dct:hasPart, because one Chronology must only describe one item in a itemized way.
A Chronology is the description of enumeration and chronology of a periodical. Use CurrentChronology or ClosedChronology to describe either current or closed Chronlogies.
Instances of Chronology must at least participate in a relation with one of the properties hasBegin or hasItemized.
See General class axioms for further rules.
ecpo:Chronology a owl:Class ;
rdfs:label "enumeration and chronology"@en ;
rdfs:label "Bestandsverlauf"@de ;
rdfs:comment "A Chronology is the description of enumeration and chronology of a periodical."@en ;
rdfs:subClassOf [
a owl:Class ;
owl:unionOf (
[ a owl:Restriction ;
owl:onProperty ecpo:hasBegin ;
owl:someValuesFrom owl:Thing
] [ a owl:Restriction ;
owl:onProperty ecpo:hasItemized ;
owl:someValuesFrom owl:Thing
]
)
] .A CurrentChronology is a Chronology which must not have a property describing an ending group. Instances of CurrentChronology must not make use hasEnd or one of its subproperties. Instances of CurrentChronology must at least participate in a relation with the property hasBegin or one of its subproperties.
ecpo:CurrentChronology a owl:Class ;
rdfs:label "current chronology"@en ;
rdfs:label "Bestandsverlauf laufend"@de ;
rdfs:comment "A Chronology without an ending group."@en ;
owl:disjointWith ecpo:ClosedChronology ;
rdfs:subClassOf ecpo:Chronology ;
rdfs:subClassOf [
a owl:Restriction ;
owl:maxCardinality "0"^^xsd:nonNegativeInteger ;
owl:onProperty ecpo:hasEnd
] ;
rdfs:subClassOf [
a owl:Restriction ;
owl:minCardinality "1"^^xsd:nonNegativeInteger ;
owl:onProperty ecpo:hasBegin
] .A ClosedChronology is a Chronology which must make usage of minimum one property describing an ending group. Instances of ClosedChronology must at least participate in a relation with both properties hasBegin or one of its subproperties and hasEnd or one of its subproperties.
ecpo:ClosedChronology a owl:Class ;
rdfs:label "closed chronology"@en ;
rdfs:label "Bestandsverlauf abgeschlossen"@de ;
rdfs:comment "A Chronology having an ending group."@en ;
owl:disjointWith ecpo:CurrentChronology ;
rdfs:subClassOf ecpo:Chronology ;
rdfs:subClassOf [
a owl:Restriction ;
owl:minCardinality "1"^^xsd:nonNegativeInteger ;
owl:onProperty ecpo:hasEnd
] ;
rdfs:subClassOf [
a owl:Restriction ;
owl:minCardinality "1"^^xsd:nonNegativeInteger ;
owl:onProperty ecpo:hasBegin
] .Relation between an item and a Chronology. Having this property means that the described periodical units by the Chronology are held by someone. To relate a Chronology and a Chronology use dct:hasPart instead.
ecpo:hasChronology a owl:ObjectProperty ;
rdfs:label "has chronology"@en ;
rdfs:label "hat Bestandsverlauf"@de ;
rdfs:range ecpo:Chronology ;
rdfs:comment "Relation between an item and a Chronology"@en .Relation between an item and a Chronology, indicating the Chronology is a gap. Having this property means that the described periodical units through the Chronology are not held by someone. To relate a Chronology and a Chronology use dct:hasPart instead.
ecpo:hasChronologyGap a owl:ObjectProperty ;
rdfs:label "has chronology gap"@en ;
rdfs:label "hat Bestandsverlauflücke"@de ;
rdfs:range ecpo:Chronology ;
rdfs:comment "Relation between an item and a Chronology, indicating the Chronology is a gap"@en .Super-property to all properties of the beginning group
ecpo:hasBegin a owl:DatatypeProperty ;
rdfs:label "has begin"@en ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "Super-property to all properties of the beginning group"@en .The caption of the beginning volume, like ‘Vol.’, ‘Bd.’, ‘Tome’
ecpo:hasBeginVolumeCaption a owl:DatatypeProperty ;
rdfs:label "has begin volume caption"@en ;
rdfs:label "hat beginnende Bandbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the beginning volume"@en ;
rdfs:subPropertyOf ecpo:hasBegin .
A textual descrimination of the beginning volume
ecpo:hasBeginVolumeExtension a owl:DatatypeProperty ;
rdfs:label "has begin volume extension"@en ;
rdfs:label "has beginnende Bandergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the beginning volume"@en ;
rdfs:subPropertyOf ecpo:hasBegin .The caption of the beginning issue, like ‘Issue’, ‘No.’, ‘Ausg.’
ecpo:hasBeginIssueCaption a owl:DatatypeProperty ;
rdfs:label "has begin issue caption"@en ;
rdfs:label "hat beginnende Ausgabenbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the beginning issue"@en ;
rdfs:subPropertyOf ecpo:hasBegin .
The numbering of the beginning issue
ecpo:hasBeginIssueNumbering a owl:DatatypeProperty ;
rdfs:label "has begin issue numbering"@en ;
rdfs:label "hat beginnende Ausgabenzählung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The numbering of the beginning issue"@en ;
rdfs:subPropertyOf ecpo:hasBegin .
A textual descrimination of the beginning issue
ecpo:hasBeginIssueExtension a owl:DatatypeProperty ;
rdfs:label "has begin issue extension"@en ;
rdfs:label "hat beginnende Ausgabenergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the beginning issue"@en ;
rdfs:subPropertyOf ecpo:hasBegin .
A temporal information for the beginning group, like a year, a season, a month or a day
ecpo:hasBeginTemporal a owl:DatatypeProperty ;
rdfs:label "has begin temporal"@en ;
rdfs:label "hat beginnende Zeit"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A temporal information for the beginning group, like a year, a season, a month or a day"@en ;
rdfs:subPropertyOf ecpo:hasBegin ;
rdfs:subPropertyOf dct:temporal .
Refines the value of the property hasBeginTemporal
ecpo:hasBeginTemporalExtension a owl:DatatypeProperty ;
rdfs:label "has begin temporal extension"@en ;
rdfs:label "hat beginnende Zeit Ergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "Refines the value of the property hasBeginTemporal"@en ;
rdfs:subPropertyOf ecpo:hasBegin ;
rdfs:subPropertyOf dct:temporal .Super-property to all properties of the ending group
ecpo:hasEnd a owl:DatatypeProperty ;
rdfs:label "has end"@en ;
rdfs:domain ecpo:ClosedChronology ;
rdfs:comment "Super-property to all properties of the ending group"@en .The caption of the ending volume, like ‘Vol.’, ‘Bd.’, ‘Tome’
ecpo:hasEndVolumeCaption a owl:DatatypeProperty ;
rdfs:label "has end volume caption"@en ;
rdfs:label "hat endende Bandbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the ending volume"@en ;
rdfs:subPropertyOf ecpo:hasEnd .
A textual descrimination of the endning volume
ecpo:hasEndVolumeExtension a owl:DatatypeProperty ;
rdfs:label "has end volume extension"@en ;
rdfs:label "hat endende Bandergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the endning volume"@en ;
rdfs:subPropertyOf ecpo:hasEnd .The caption of the ending issue, like ‘Issue’, ‘No.’, ‘Ausg.’
ecpo:hasEndIssueCaption a owl:DatatypeProperty ;
rdfs:label "has end issue caption"@en ;
rdfs:label "hat endende Ausgabenbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the ending issue"@en ;
rdfs:subPropertyOf ecpo:hasEnd .The numbering of the ending issue
ecpo:hasEndIssueNumbering a owl:DatatypeProperty ;
rdfs:label "has end issue numbering"@en ;
rdfs:label "hat endende Ausgabenzählung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The numbering of the ending issue"@en ;
rdfs:subPropertyOf ecpo:hasEnd .A textual descrimination of the endig issue
ecpo:hasEndIssueExtension a owl:DatatypeProperty ;
rdfs:label "has end issue extension"@en ;
rdfs:label "hat endende Ausgabenergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the ending issue"@en ;
rdfs:subPropertyOf ecpo:hasEnd .A temporal information for the ending group, like a year, a season, a month or a day
ecpo:hasEndTemporal a owl:DatatypeProperty ;
rdfs:label "has end temporal"@en ;
rdfs:label "has endende Zeit"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A temporal information for the ending group, like a year, a season, a month or a day"@en ;
rdfs:subPropertyOf ecpo:hasEnd ;
rdfs:subPropertyOf dct:temporal .
Refines the value of the property hasEndTemporal
ecpo:hasEndTemporalExtension a owl:DatatypeProperty ;
rdfs:label "has end temporal extension"@en ;
rdfs:label "hat endende Zeit Ergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "Refines the value of the property hasEndTemporal"@en ;
rdfs:subPropertyOf ecpo:hasEnd ;
rdfs:subPropertyOf dct:temporal .
Super-property to all properties of a itemized Chronology
ecpo:hasItemized a owl:DatatypeProperty ;
rdfs:label "has itemized"@en ;
rdfs:label "hat einzelne"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "Super-property to all properties of a itemized Chronology"@en .
The caption of the volume
ecpo:hasItemizedVolumeCaption a owl:DatatypeProperty ;
rdfs:label "has itemized volume caption"@en ;
rdfs:label "hat einzelne Bandbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the volume"@en ;
rdfs:subPropertyOf ecpo:hasItemized .
A textual descrimination of the volume
ecpo:hasItemizedVolumeExtension a owl:DatatypeProperty ;
rdfs:label "has itemized volume extension"@en ;
rdfs:label "hat einzelne Bandergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the volume"@en ;
rdfs:subPropertyOf ecpo:hasItemized .The caption of the issue
ecpo:hasItemizedIssueCaption a owl:DatatypeProperty ;
rdfs:label "has itemized issue caption"@en ;
rdfs:label "hat einzelne Ausgabenbeschriftung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The caption of the issue"@en ;
rdfs:subPropertyOf ecpo:hasItemized .
The numbering of the issue
ecpo:hasItemizedIssueNumbering a owl:DatatypeProperty ;
rdfs:label "has itemized issue numbering"@en ;
rdfs:label "hat einzelne Ausgabenzählung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "The numbering of the issue"@en ;
rdfs:subPropertyOf ecpo:hasItemized .A textual descrimination of the issue
ecpo:hasItemizedIssueExtension a owl:DatatypeProperty ;
rdfs:label "has itemized issue extension"@en ;
rdfs:label "hat einzelne Ausgabenergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A textual descrimination of the issue"@en ;
rdfs:subPropertyOf ecpo:hasItemized .A temporal information, like a year, a season, a month or a day
ecpo:hasItemizedTemporal a owl:DatatypeProperty ;
rdfs:label "has itemized temporal"@en ;
rdfs:label "has einzelne Zeit"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "A temporal information, like a year, a season, a month or a day"@en ;
rdfs:subPropertyOf ecpo:hasItemized ;
rdfs:subPropertyOf dct:temporal .
Refines the value of the property hasItemizedTemporal
ecpo:hasItemizedTemporalExtension a owl:DatatypeProperty ;
rdfs:label "has temporal extension"@en ;
rdfs:label "hat Zeit Ergänzung"@de ;
rdfs:domain ecpo:Chronology ;
rdfs:comment "Refines the value of the property hasItemizedTemporal"@en ;
rdfs:subPropertyOf ecpo:hasItemized ;
rdfs:subPropertyOf dct:temporal .Used to transport the whole source description of a chronology. See examples for usage.
dc:coverage a owl:AnnotationProperty ;
skos:scopeNote "Used to transport the whole source description of a chronology."@en ;
rdfs:definedBy <http://purl.org/dc/elements/1.1/> .Used to give information about the frequency with which items are added to the collection. See examples for usage.
dct:accrualPeriodicity a owl:AnnotationProperty ;
skos:scopeNote "Used to give information about the frequency with which items are added to the collection."@en ;
rdfs:definedBy <http://purl.org/dc/elements/1.1/> .Used to transport the whole source description of a chronology. See examples for usage.
dct:description a owl:AnnotationProperty ;
skos:scopeNote "Used to transport the whole source description of a chronology."@en ;
rdfs:definedBy <http://purl.org/dc/elements/1.1/> .Used to give information about the number of units in the chronology. See examples for usage.
dct:extend a owl:AnnotationProperty ;
skos:scopeNote "Used to give information about the number of units in the chronology."@en ;
rdfs:definedBy <http://purl.org/dc/elements/1.1/> .Used to relate a Chronology to a sub chronology. See examples for usage.
dct:hasPart a owl:AnnotationProperty ;
skos:scopeNote "Used to relate a chronology to a sub chronology."@en ;
rdfs:definedBy <http://purl.org/dc/elements/1.1/> .Instance of CurrentChronology. Use this individual to simply state that an item has a current Chronology. See examples for usage.
ecpo:Current a owl:NamedIndividual ;
rdf:type ecpo:CurrentChronology ;
rdfs:label "current"@en ;
rdfs:label "laufend"@de ;
owl:differentFrom ecpo:Closed ;
rdfs:comment "A current Chronology."@en ;
ecpo:hasBegin "true"^^xsd:boolean .Instance of ClosedChronology. Use this individual to simply state that an item has a closed Chronology. See examples for usage.
ecpo:Closed a owl:NamedIndividual ;
rdf:type ecpo:ClosedChronology ;
rdfs:label "closed"@en ;
rdfs:label "abgeschlossen"@de ;
owl:differentFrom ecpo:Current ;
rdfs:comment "A closed Chronology."@en ;
ecpo:hasBegin "true"^^xsd:boolean ;
ecpo:hasEnd "true"^^xsd:boolean .The individuals Closed and Current are different from each other.
[]
a owl:AllDifferent ;
owl:distinctMembers (
ecpo:Closed
ecpo:Current
) .Instances of Chronology which participate in relations with hasBegin and hasEnd may not participate in relations with hasItemized and vice versa.
[]
rdf:type owl:Class ;
owl:disjointWith [
rdf:type owl:Class ;
owl:intersectionOf (
ecpo:Chronology [
rdf:type owl:Restriction ;
owl:onProperty ecpo:hasItemized ;
owl:someValuesFrom owl:Thing
]
)
] ;
owl:intersectionOf (
ecpo:Chronology [
rdf:type owl:Class ;
owl:unionOf (
[
rdf:type owl:Restriction ;
owl:onProperty ecpo:hasBegin ;
owl:someValuesFrom owl:Thing
] [
rdf:type owl:Restriction ;
owl:onProperty ecpo:hasEnd ;
owl:someValuesFrom owl:Thing
]
)
]
) .Instances of Chronology which participates in a relation with hasEnd must also participate in a relation with hasBegin.
[]
rdf:type owl:Class ;
rdfs:subClassOf [
rdf:type owl:Restriction ;
owl:onProperty ecpo:hasBegin ;
owl:someValuesFrom owl:Thing
] ;
owl:intersectionOf (
ecpo:Chronology [
rdf:type owl:Restriction ;
owl:onProperty ecpo:hasEnd ;
owl:someValuesFrom owl:Thing
]
) .It is not the intension of ECPO to restrict the ontology extension through other ontologies on purpose. If you have suggestions to make this ontology more useable, please give me Feedback.
In the following examples a hypothetical copy of a document $item describes a holding of a periodical held by someone.
Statement for a current chronology
$item ecpo:hasChronology ecpo:Current .This statement just says that an item has a current chronology without giving futher information which units are held.
Statement for a closed chronology
$item ecpo:hasChronology ecpo:Closed .This statement just says that an item has a closed chronology without giving futher information which units are held.
Description of a current Chronology
Given description: v.26,issue 1-
$item ecpo:hasChronology [
a ecpo:CurrentChronology ;
ecpo:hasBeginVolumeCaption "v." ;
ecpo:hasBeginVolumeNumbering "26" ;
ecpo:hasBeginIssueCaption "issue" ;
ecpo:hasBeginIssueNumbering "1"
] .Description of a closed Chronology
Given description: v.26,issue 1-v.31, issue 6
$item ecpo:hasChronology [
a ecpo:ClosedChronology ;
ecpo:hasBeginVolumeCaption "v." ;
ecpo:hasBeginVolumeNumbering "26" ;
ecpo:hasBeginIssueCaption "issue" ;
ecpo:hasBeginIssueNumbering "1" ;
ecpo:hasEndVolumeCaption "v." ;
ecpo:hasEndVolumeNumbering "31" ;
ecpo:hasEndIssueCaption "issue" ;
ecpo:hasEndIssueNumbering "6"
] .Description of a closed Chronology with temporal information
Given description: (2001:Jan.1-2006:June 30)=no.320-no.385
$item ecpo:hasChronology [
a ecpo:ClosedChronology ;
ecpo:hasBeginTemporal "2001" ;
ecpo:hasBeginTemporalExtension "Jan.1" ;
ecpo:hasBeginIssueCaption "no." ;
ecpo:hasBeginIssueNumbering "320" ;
ecpo:hasEndTemporal "2006" ;
ecpo:hasEndTemporalExtension "June 30" ;
ecpo:hasEndIssueCaption "no." ;
ecpo:hasEndIssueNumbering "385"
] .Description of a current chronology with subchronologies
Given description: v.5:no.1(1975:spring)-v.7:no.4(1977:autumn),v.8:no.2(1978:winter)-
$item ecpo:hasChronology [
a ecpo:CurrentChronology ;
dct:hasPart [
a ecpo:ClosedChronology ;
ecpo:hasBeginVolumeCaption "v." ;
ecpo:hasBeginVolumeNumbering "5" ;
ecpo:hasBeginIssueCaption "no." ;
ecpo:hasBeginIssueNumbering "1" ;
ecpo:hasBeginTemporal "1975" ;
ecpo:hasBeginTemporalExtension "spring" ;
ecpo:hasEndVolumeCaption "v." ;
ecpo:hasEndVolumeNumbering "7" ;
ecpo:hasEndIssueCaption "no." ;
ecpo:hasEndIssueNumbering "4" ;
ecpo:hasEndTemporal "1977" ;
ecpo:hasEndTemporalExtension "autumn"
] ;
dct:hasPart [
a ecpo:ClosedChronology ;
ecpo:hasBeginVolumeCaption "v." ;
ecpo:hasBeginVolumeNumbering "8" ;
ecpo:hasBeginIssueCaption "no." ;
ecpo:hasBeginIssueNumbering "2" ;
ecpo:hasBeginTemporal "1978" ;
ecpo:hasBeginTemporalExtension "winter"
] .In this example the main chronology is made as an instance of CurrentChronology for the sake of expressivity. It also had been made as an instance of Chronology. But this way it is easier to tell if the whole chronology is current or not.
Description of a chronology in an itemized way and comments
Given description: v.1 v.2 v.2[i.e. 3] v.6
In this example Volume 3 was incorrectly numbered by the publisher.
$item ecpo:hasChronology [
a ecpo:Chronology ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "1"
] ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "2"
] ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "2" ;
ecpo:hasItemizedVolumeExtension "[i.e. 3]" ;
dct:description "Volume 3 was incorrectly numbered by the publisher"@en
] ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "6"
]
] .The property hasItemizedVolumeExtension is described as “A textual descrimination of the volume”. In this example it is used to transport the correction statement for the wron volume numbering. The expression with the property dct:description is optional.
Description of a gap in the chronology
As in the example above the volumes v.4 and v.5 are missing. There are two possibilities to express this.
Itemized way
$item ecpo:hasChronologyGap [
a ecpo:Chronology ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "4"
] ;
dct:hasPart [
a ecpo:Chronology ;
ecpo:hasItemizedVolumeCaption "v." ;
ecpo:hasItemizedVolumeNumbering "5"
]
] .Range
$item ecpo:hasChronologyGap [
a ecpo:Chronology ;
ecpo:hasBeginVolumeCaption "v." ;
ecpo:hasBeginVolumeNumbering "4" ;
ecpo:hasEndVolumeCaption "v." ;
ecpo:hasEndVolumeNumbering "5"
] .Usage of dct:description, dct:accrualPeriodicity, dct:extend and dc:coverage
The term dct:description is recommended to give a description of the chronology. The term dc:coverage is recommended to transport the given description if there is one. The term dct:accrualPeriodicity is recommended to give information about the frequency with which items are added to the collection. The term dct:extend is recommended to give information about the number of units in the chronology.
Given description: ser.1:no.1-ser.1:no.4,ser.2:no.1-ser.2:no.6
$item ecpo:hasChronology [
a ecpo:CurrentChronology ;
dct:hasPart [
a ecpo:ClosedChronology ;
ecpo:hasBeginVolumeCaption "ser." ;
ecpo:hasBeginVolumeNumbering "1" ;
ecpo:hasBeginIssueCaption "no." ;
ecpo:hasBeginIssueNumbering "1" ;
ecpo:hasEndVolumeCaption "ser." ;
ecpo:hasEndVolumeNumbering "1" ;
ecpo:hasEndIssueCaption "no." ;
ecpo:hasEndIssueNumbering "4" ;
dct:description "double number issue 2/3"@en ;
dct:accrualPeriodicity [ rdfs:label "4 numbers per series"@en ] ;
dct:extent [ rdf:value "3" ] .
] ;
dct:hasPart [
a ecpo:ClosedChronology ;
ecpo:hasBeginVolumeCaption "ser." ;
ecpo:hasBeginVolumeNumbering "2" ;
ecpo:hasBeginIssueCaption "no." ;
ecpo:hasBeginIssueNumbering "1" ;
ecpo:hasEndVolumeCaption "ser." ;
ecpo:hasEndVolumeNumbering "2" ;
ecpo:hasEndIssueCaption "no." ;
ecpo:hasEndIssueNumbering "6" ;
dct:description "triple number issue 2-4"@en ;
dct:accrualPeriodicity [ rdfs:label "6 numbers per series"@en ] ;
dct:extent [ rdf:value "4" ] .
] ;
dct:description "the numbers per series varies"@en ;
dc:coverage "ser.1:no.1-ser.1:no.4,ser.2:no.1-ser.2:no.6"
] .In this example the number of issues per series varies, which is expressed through the term dct:description in the main chronology.
Each sub-chronology has another dct:description which give more detailed information on the parts in textual form.
The sub-chronologies also contain the term dct:accrualPeriodicity which gives a hint about how many numbers a sub-chronologies consits of and also the term dct:extent which gives the exact number of units in the sub-chronologies. Both terms must have a resource as range.
The term dc:coverage holds the whole source description in once, for what ever reason.
[RFC 2119] S. Bradner: Key words for use in RFCs to Indicate Requirement Levels. March 1997 http://tools.ietf.org/html/rfc2119.
[RFC 2396] T. Berners-Lee et al.: Uniform Resource Identifiers (URI): Generic Syntax. August 1998 http://tools.ietf.org/html/rfc2396.