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Meeting Notes 02.07.2021
Participants:
- Casper Andersen
- Antanas Vaitkus
- Emanuele Ghedini
- Francesca L. Bleken
- Joana Morgado
- Saulius Grazulis
- Jesper Friis
- Rickard Armiento
- Matthias Büschelberger
Emanuele presents again the new top-level division of the “CIF top” ontology. The goal is to be able to represent everything --- all the relationships, but also all the CIF data names.
The three major hierarchies:
- DictionaryDefinedItem
- Structure (the data structure)
- Type
Through annotations, the meta-meta level can be expressed, i.e., all the DDL concepts and annotations. Many of the annotations have no direct impact/meaning in OWL and the ontology, but rather for the reader.
Potentially, have a CIF parser extend not just the individuals and the knowledge graph, but also the ontology itself with classes, e.g., for locally-defined data names.
Rickard: The new version of the CIF top ontology starts to also define the syntax of a CIF file - is this what we want?
Joining loop “tables” is always a left outer join operation.