Period

Author: Denitsa Nenova, George Bruseker

Version: 1.0

The Period model is intended to enable the documentation and correct referencing of historical periods for use in datation. Typical instances of Period include period divisions of major epochs, as well as well known century divisions for periods of art history. Period is used primarily as a reference model.

	Name	URI
Root Ontology Node	E4 Period	https://cidoc-crm.org/Entity/E4-Period/version-7.1.1
Type Differentiator	N/A	N/A

Model Sections Description

Information Category	Information Collections	Description
Names and Classifications	Names/Alternative Names/Identifiers/Type	The researcher can document various names and classification regarding the Period .
Existence	Existence	The researcher can document various free text descriptions of the Period .
Documentation	Digital Object	The researcher can document citations relative to the period, link to images related to period and document external URIs of documentation for the same Period .

Period Names and Classifications

The attribution of names and types to Period is a basic human activity. A chief factor in disambiguating which Period is referred to in historical texts is understanding the various names and identifiers that have been given to a Period at different moments. Likewise, additional classifiers of the Period help in the disambiguation, in an information system, of the reference to one Period from another.

Filed ID	Name	Description	Data Type	CRM Path
LAF.6	Period Name	This field is used to record the string value of the name attributed to the documented Period .	String	->p1->E33_E41[4_1]->p190->rdf:literal
LAF.11	Period Type	This field is used to record the formal type of the documented Period .	Concept	->p2->E55[11_1]
LAF.10	Period ID	This field is used to record an identifier attributed to the documented Period .	String	->p1->E42[8_1]->p190->rdf:literal
LAF.9	ID Type	This field is used to record the type of the identifier attributed to the documented Period .	Concept	->p1->E42[8_1]->p2->E55[9_1]

- Period Names and Classifications Ontology Graph

Screenshot

- Period Names and Classifications RDF

@prefix crm: <http://www.cidoc-crm.org/cidoc-crm/> .

<https://pma.us/models/period/E4> a crm:E4_Period ;
    crm:P1_is_identified_by <https://linked.art/example/conceptual_object/4_1>,
        <https://linked.art/example/conceptual_object/8_1> ;
    crm:P2_has_type <https://linked.art/example/type/11_1> .

<https://linked.art/example/conceptual_object/4_1> a crm:E33_E41_Linguistic_Appellation ;
    crm:P190_has_symbolic_content "Name_string_value" .

<https://linked.art/example/conceptual_object/8_1> a crm:E42_Identifier ;
    crm:P190_has_symbolic_content "Identifier_value_content" ;
    crm:P2_has_type <https://linked.art/example/identifier/9_1> .

<https://linked.art/example/identifier/9_1> a crm:E55_Type .

<https://linked.art/example/type/11_1> a crm:E55_Type .

- Period Names and Classifications JSON-LD

{
  "@context": "https://linked.art/ns/v1/linked-art.json",
  "@graph": [
    {
      "id": "https://linked.art/example/identifier/9_1",
      "type": "Type"
    },
    {
      "classified_as": [
        "https://linked.art/example/identifier/9_1"
      ],
      "content": "Identifier_value_content",
      "id": "https://linked.art/example/conceptual_object/8_1",
      "type": "Identifier"
    },
    {
      "content": "Name_string_value",
      "id": "https://linked.art/example/conceptual_object/4_1",
      "type": "Name"
    },
    {
      "id": "https://linked.art/example/type/11_1",
      "type": "Type"
    },
    {
      "classified_as": [
        "https://linked.art/example/type/11_1"
      ],
      "id": "https://pma.us/models/period/E4",
      "identified_by": [
        "https://linked.art/example/conceptual_object/4_1",
        "https://linked.art/example/conceptual_object/8_1"
      ],
      "type": "Period"
    }
  ]
}

Period Existence

Of essential importance in identifying Periods is their timespan outlining their existence.

Filed ID	Name	Description	Data Type	CRM Path
LAF.177	Period Timespan	This field is used to link the documented temporal periodto an instance of time-span recording the temporal extent of the period.	Collection [Timespan]	->P4->E52[177_1]

- Period Existence Ontology Graph

Screenshot

- Period Existence RDF

@prefix crm: <http://www.cidoc-crm.org/cidoc-crm/> .

<https://pma.us/models/period/E4> a crm:E4_Period ;
    crm:P4_has_time-span <https://linked.art/example/time_span/177_1> .

<https://linked.art/example/time_span/177_1> a crm:E52_Time-Span .

- Period Existence JSON-LD

{
  "@context": "https://linked.art/ns/v1/linked-art.json",
  "@graph": [
    {
      "id": "https://pma.us/models/period/E4",
      "timespan": "https://linked.art/example/time_span/177_1",
      "type": "Period"
    },
    {
      "id": "https://linked.art/example/time_span/177_1",
      "type": "TimeSpan"
    }
  ]
}

Period Documentation

This information category unites referential information about the documented Period, providing contextual data about them.

Filed ID	Name	Description	Data Type	CRM Path
PMAF.83	Digital Object	This field is used to link to an instance of digital resource which serves as a digital reference document for the documented Period.	Reference Model [Digital Object]	->P02i->PC67[A83_1]->P01->D1[A83_2]
PMAF.84	Digital Object Type	This field is used to link to a type record which indicates the kind of reference supported by the digital resource that serves as a reference for the documented Period.	Concept	->P02i->PC67[A83_1]->P67.1->E55[A84_1]

- Period Documentation Ontology Graph

Screenshot

- Period Documentation RDF

@prefix crm: <http://www.cidoc-crm.org/cidoc-crm/> .

<https://pma.us/models/period/E4> a crm:E4_Period ;
    crm:P02i_is_range_of <https://linked.art/example/reified_property/A83_1> .

<https://linked.art/example/conceptual_object/A83_2> a crm:D1_Digital_Object .

<https://linked.art/example/conceptual_object/A84_1> a crm:E55_Type .

<https://linked.art/example/reified_property/A83_1> a crm:PC67_refers_to ;
    crm:P01_has_domain <https://linked.art/example/conceptual_object/A83_2> ;
    crm:P67.1_has_type <https://linked.art/example/conceptual_object/A84_1> .

- Period Documentation JSON-LD

{
  "@context": "https://linked.art/ns/v1/linked-art.json",
  "@graph": [
    {
      "id": "https://linked.art/example/conceptual_object/A84_1",
      "type": "Type"
    },
    {
      "crm:P02i_is_range_of": {
        "id": "https://linked.art/example/reified_property/A83_1"
      },
      "id": "https://pma.us/models/period/E4",
      "type": "Period"
    },
    {
      "id": "https://linked.art/example/conceptual_object/A83_2",
      "type": "crm:D1_Digital_Object"
    },
    {
      "crm:P01_has_domain": {
        "id": "https://linked.art/example/conceptual_object/A83_2"
      },
      "crm:P67.1_has_type": {
        "id": "https://linked.art/example/conceptual_object/A84_1"
      },
      "id": "https://linked.art/example/reified_property/A83_1",
      "type": "crm:PC67_refers_to"
    }
  ]
}