Data Model
The DHELO data model is designed to structure and interconnect heterogeneous cultural heritage resources using the principles of Linked Open Data. It provides a flexible and interoperable framework that allows for the integration of diverse datasets, ensuring meaningful connections between places, periods, research projects, people, institutions, and digital resources.
At its core, the model follows established ontologies and metadata standards to enhance data reusability and semantic enrichment. Each entity within DHELO is described using structured relationships, enabling users to explore resources through geographical, chronological, and conceptual links. This approach fosters a dynamic and interconnected digital ecosystem for cultural heritage research and discovery.
DHeLO adopts a semantic web approach, leveraging established Linked Open Vocabularies to ensure interoperability and standardization of metadata. The platform currently employs the following vocabularies:
- Dublin Core Terms – A widely used metadata standard for resource description.
- FOAF (Friend of a Friend) – A vocabulary designed to describe people, organizations, and their relationships.
Organizations
DHeLO adopts a linked open data approach, structuring information about institutions using the FOAF:Organizationclass. Each organization is described through a set of metadata fields that enhance discoverability and connectivity within the platform.
- dcterms:title – The official name of the organization, ensuring standardized identification.
- dcterms:alternativeTitle – Any alternative names or abbreviations commonly used for the institution.
- dcterms:description – A brief overview of the organization, including its research focus and contributions to cultural heritage.
- dcterms:isPartOf – Indicates whether the organization is part of a larger institution, such as a university department or research institute.
- dcterms:identifier – A unique identifier assigned to the institution, primarily based on the Research Organization Registry (ROR), ensuring interoperability with global research data infrastructures.
- foaf:homepage – A link to the institution’s official website, providing direct access to further information and resources.
These fields facilitate structured and hierarchical exploration of research institutions, ensuring interoperability and integration with external datasets.
People
DHeLO structures information about individuals using a linked open data approach, relying on the FOAF:Personclass. Each person is described through a set of metadata fields designed to ensure clear identification and integration with external research infrastructures.
- dcterms:title – The full name of the person, including given name and surname.
- foaf:name – The given name of the person.
- foaf:surname – The surname of the person.
- dcterms:identifier – A unique identifier linking to the individual’s ORCID profile, ensuring interoperability with global research data infrastructures.
For reasons of data accuracy and traceability, DHeLO does not store information about a person's institutional affiliations. These relationships are subject to frequent changes and can be difficult to maintain over time. Instead, users are encouraged to refer to the person's ORCID profile, where up-to-date affiliation data is available.
This approach ensures that personal records remain stable while allowing external platforms to handle dynamic institutional information.
Projects
DHeLO structures information about research projects using the FOAF:Project class, ensuring a standardized representation of projects and their relationships. Each project is described through a set of metadata fields that provide details on its scope, duration, contributors, and evolution over time.
- dcterms:title – The official title of the project.
- dcterms:alternativeTitle – Alternative names, acronyms, or abbreviations associated with the project.
- dcterms:description – A brief overview of the project's objectives, methodologies, and impact.
- dcterms:date – The project’s timeframe, typically indicating its start and end dates.
- bibo:status – The current status of the project (e.g., ongoing, completed, discontinued).
- dcterms:replaces (Continues) – Indicates a preceding project that this one builds upon or extends.
- dcterms:isReplacedBy (Continued by) – References a subsequent project that follows or expands upon this one.
- dcterms:isPartOf – Specifies whether the project is part of a larger initiative, consortium, or framework.
- foaf:homepage – A link to the official project website, providing further details and access to project outputs.
- dcterms:identifier – A unique reference assigned to the project, which may correspond to external databases or internal records.
- dcterms:creator (Project Coordinator(s)) – Identifies the main person or institution responsible for coordinating the project.
- dcterms:contributor (Project Participant(s)) – Lists individuals or institutions that have contributed to the project.
This structured model ensures that research projects are interlinked, facilitating navigation through related initiatives and understanding their evolution over time
Dataset
- dcterms:title – A name given to the resource; it provides the primary textual identification of the entity within the system.
- dcterms:description – A textual description of the content or function of the resource, supporting its interpretation and contextualisation.
- dcterms:creator – A person, organisation, or other agent primarily responsible for the creation of the resource.
- dcterms:contributor – A person or organisation that made a significant contribution to the creation of the resource, without being chiefly responsible for it.
- dcterms:type (Data Type) – The general nature or genre of the resource, expressed as a conceptual or functional category.
- dcterms:format – The physical or digital format of the resource, typically referring to the file type, standard, or technical encoding.
- dcterms:medium (Made with) – The material or medium used to create the resource; in DHeLO, this may also refer to tools or technologies involved in its production.
- dcterms:isPartOf (Project(s)) – A related resource in which the described resource is physically or conceptually included; commonly used to associate data with projects or initiatives.
- dcterms:hasPart – A related resource that is included within or constitutes a component of the described resource.
- edm:isShownAt – A URL linking to a web page where the resource is publicly accessible and presented in its original contextual environment.
- dcterms:identifier – An unambiguous reference to the resource, used to identify it uniquely within a given context.
- dcterms:accessRights – Information about access conditions to the resource, including any applicable restrictions or limitations.
- dcterms:rights – Information about legal rights associated with the resource, such as copyright, licences, or other forms of legal protection.
- dcterms:created – The date on which the resource was originally created.
- dcterms:issued – The date on which the resource was formally published or made publicly available.
- dcterms:publisher – An entity responsible for making the resource available, typically through publication or dissemination.
- dcterms:language – A language of the intellectual content of the resource.
- dcterms:relation (Related to) – A generic relationship between the described resource and another resource, used when the specific nature of the relationship is not otherwise defined.
- dcterms:temporal – A temporal characteristic of the resource, expressed as a period, date, or chronological interval.
- dcterms:spatial – A spatial characteristic of the resource, referring to a place, geographical area, or spatial concept.
Interactive resources
- dcterms:title – A name given to the resource; it provides the primary textual identification of the entity within the system.
- dcterms:description – A textual description of the content, scope, or function of the resource, supporting its interpretation and contextualisation.
- dcterms:creator – A person, organisation, or other agent primarily responsible for the creation of the resource.
- dcterms:contributor – A person or organisation that contributed to the creation or enrichment of the resource without being chiefly responsible for it.
- dcterms:medium (Made with) – The material, medium, or tools used to create the resource; in DHeLO, this may also refer to techniques or technologies involved in its production.
- dcterms:isPartOf (Project(s)) – A related resource or aggregation of which the described resource forms a part, commonly used to link data to projects or initiatives.
- dcterms:hasPart – A related resource that constitutes a component or subdivision of the described resource.
- edm:isShownAt – A URL linking to a web page where the resource is publicly accessible and presented within its original contextual environment.
- dcterms:identifier – An unambiguous reference assigned to the resource, used to identify it uniquely within a given context.
- dcterms:accessRights – Information about the conditions under which the resource can be accessed, including any restrictions or limitations.
- dcterms:rights – Information about legal rights held over the resource, such as copyright, licensing terms, or other legal constraints.
- dcterms:created – The date on which the resource was originally created.
- dcterms:issued – The date on which the resource was formally published or made publicly available.
- dcterms:publisher – An entity responsible for making the resource available, typically through publication or dissemination.
- dcterms:language – A language of the intellectual content of the resource.
- dcterms:relation (Related to) – A general relationship between the described resource and another resource, used when the specific nature of the relationship is not otherwise defined.
- dcterms:temporal – A temporal characteristic of the resource, expressed as a date, period, or chronological interval.
- dcterms:spatial – A spatial characteristic of the resource, referring to a location, geographical area, or spatial concept.
Software
- dcterms:title – A name given to the resource; it provides the primary textual identification of the entity within the system.
- dcterms:alternative (Alternative name) – An alternative or secondary name by which the resource is known, including acronyms, variants, or translated titles.
- dcterms:description – A textual description of the content, purpose, or function of the resource, supporting its understanding and contextualisation.
- dcterms:type – The general nature or category of the resource, describing its functional or conceptual character.
- sdont:operatingSystems – The operating system or systems required to install, run, or properly use the resource.
- dcterms:requires – A related resource or technical dependency that is required in order to use, execute, or understand the described resource.
- dcterms:license – A legal document or licensing statement specifying the terms under which the resource may be used, reused, or distributed.
- dcterms:identifier – An unambiguous reference assigned to the resource, used to identify it uniquely within a given context.
- edm:isShownAt – A URL linking to a web page where the resource is publicly accessible and presented within its original contextual environment.
- dcterms:creator – A person, organisation, or other agent primarily responsible for the creation or development of the resource.