Unique identifier for digital objects, similar to a DOI. It provides a permanent link to content, ensuring consistent access even if the item's location changes. HDLs are commonly used in academic and research contexts to manage and cite digital resources like datasets, publications, and reports.

Attributes of Resource

Property	Expected value(s)	Description
audience	Literal	Class of user for which the content of a resource is intended, or for whom the content is considered suitable.
authority link	--	Actionable IRI linking to an authoritative controlled vocabulary.
control code	Literal	Alphanumeric string or indicator used to find and identify the resource.
created date	Literal	The date a Resource was created.
date	--	Date associated with the resource.
description	Literal	Description of the resource.
equivalent	--	actionable IRI linking to a Real World Object.
has instance	Instance	Relationship used to connect Works to Instances.
image	--	IRI that points to an image of the resource.
label	Literal	Text string representing the name of resource.
language	Language Category	Language associated with the resource.
map	Identifier	Connects Resources to persistent Identifiers like DOI, ISBN, etc.
note	Literal	Additional descriptive information associated with the resource.
preferred label	Literal	Preferred human readable label of the resource.
rights statement	Literal	Rights statement associated with the origin resource.
updated date	Literal	The date a Resource was last updated.
wikipedia article	--	Actionable IRI linking to an authoritative Wikipedia article.

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More specific types