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Hierarchical Event Descriptors
Last uploaded:
July 3, 2024
| Acronym | HED |
| Visibility | Public |
| Description | HED (Hierarchical Event Descriptors) is a standardized vocabulary for describing what happens during experiments and a framework for mapping these terms and other metadata onto the experimental timeline to enable analysis. HED is a subtag system organized by the top-level categories: Event, Agent, Action, Item, Property, and Relation. Users create HED annotations as comma-separated, parenthesized lists of terms. See https://www.hed-resource.org for documentation, tutorials and other resources. Recently we have created an ontology representation of the HED vocabulary (HED schema) to provide a better mechanism for linking the HED terms to terms from other ontologies and to provide better provenance information. The HED tags as well as auxiliary information such as types of units and types of values are represented as classes. The HED schema attributes are represented either as DataProperty or ObjectProperty depending on their range. Some additional attributes that are not inherited are represented as AnnotationProperty. HED is the standard used for event annotation in BIDS (Brain Imaging Data Structure) a standard for storing neuroimaging repository and is used by datasets on several repositories such as openNeuro and Nemar. |
| Status | Production |
| Format | OWL |
| Contact | Kay Robbins, kay.robbins@utsa.edu |
| Categories | Vocabularies |
| Version | Released | Uploaded | Downloads |
|---|---|---|---|
| releases/2024-06-10 (Parsed, Indexed, Metrics, Annotator) | 07/03/2024 | 07/03/2024 | OWL | CSV | RDF/XML |
No views of HED available
| Classes | 1,358 |
| Individuals | 0 |
| Properties | 46 |
| Maximum depth | 7 |
| Maximum number of children | 46 |
| Average number of children | 4 |
| Classes with a single child | 122 |
| Classes with more than 25 children | 3 |
| Classes with no definition | 1,354 |
We are still collecting data for HED
No projects using HED