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README.md

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-# astro-facilities
+# RDF Ontologies for Astronomical Data and Workflows
+
+This repository contains two RDF ontologies that include astronomical concepts and workflows. Slightly different versions of these ontologies are used in a [MMODA](https://www.astro.unige.ch/mmoda/) workflow, [analyse-short-astro-text](https://gitlab.renkulab.io/astronomy/mmoda/analyse-short-astro-text). Both should be part of the main [ODA ontology](https://odahub.io/ontology/)
+
+## Ontologies
+
+1. [**Astro-Facilities Ontology:**](astro-facilities.ttl)  
+   This ontology focuses on concepts such as: telescopes, observatories, surveys, and space telescopes.
+
+2. [**MMODA-Workflows Ontology:**](mmoda-workflows.ttl)  
+   This ontology captures the [MMODA](https://www.astro.unige.ch/mmoda/) workflows (publicaly available on the 25th of November 2024) and their relationship to the instruments captured in the previous ontology.
+
+## Standards and Resources
+
+The ontologies build upon widely-used vocabularies and ontologies in the semantic web and astronomical domains, ensuring alignment with existing standards:
+
+- [Dublin Core Terms](http://purl.org/dc/terms/)
+- [OWL Web Ontology Language](http://www.w3.org/2002/07/owl)
+- [RDF Schema (RDFS)](http://www.w3.org/2000/01/rdf-schema)
+- [SKOS (Simple Knowledge Organization System)](http://www.w3.org/2004/02/skos/core)
+- [IVOA Messenger Ontology](http://www.ivoa.net/rdf/messenger)
+- [IVOA UAT Ontology](http://www.ivoa.net/rdf/uat)
+- [ODA Ontology](https://odahub.io/ontology)
+
+## New Classes and Properties
+
+The ontologies introduce four new classes and one object property to enhance the existing semantic structure:
+
+### New Classes:
+1. **`misctelescope`**  
+   A class for entities that are not obviously described by the other categories (8 entities).
+
+2. **`telescope-class`**  
+   A class defining different categories of telescopes based on their characteristics and functionalities, e.g. Corrected Dall Kikham (CDK) or Schmidt telescopes (10 entities).
+
+3. **`institution`**  
+   Represents organizations or institutions that manage or operate astronomical facilities (11 entities).
+
+4. **`observatory`**  
+  A concept related to the [**`observatories`**](https://www.ivoa.net/rdf/uat/2024-06-25/uat.html#observatories) concept. In practice, for simplicity, all entities that include in their name the word "Observatory" are classified as **`observatory`** (129 entities).
+
+### New Object Property:
+- **`canDetect`**  
+  Relates an entity (e.g., a telescope or survey) to the type of messengers it can detect, as defined in the [IVOA Messenger Ontology](http://www.ivoa.net/rdf/messenger) and [IVOA UAT Ontology](http://www.ivoa.net/rdf/uat) for the gravitational waves.
+
+## Other classes:
+1. **`http://www.ivoa.net/rdf/uat#telescopes`** (292 entities)
+2. **`http://www.ivoa.net/rdf/uat#surveys`** (85 entities)
+3. **`http://www.ivoa.net/rdf/uat#space-telescopes`** (123 entities)
+4. **`http://www.ivoa.net/rdf/uat#refracting-telescopes`** (17 entities)
+5. **`http://www.ivoa.net/rdf/uat#radio-telescopes`** (60 entities)
+6. **`http://www.ivoa.net/rdf/uat#radio-interferometry`** (1 entity)
+7. **`http://www.ivoa.net/rdf/uat#neutrino-telescopes`** (3 entities)
+8. **`http://www.ivoa.net/rdf/uat#astronomical-instrumentation`** (46 entities)
+
+## Contributing
+
+Contributions are welcome! If you have suggestions for improvements or extensions, please open an issue or submit a pull request.