Commit 298002a9 authored by Dimitris Zeginis's avatar Dimitris Zeginis

update readme file

parent 299259e6
# CYBELE Common Semantic Model
The model will serve as a common reference model for the semantic annotation and sharing of CYBELE demonstrators data supporting the on demand data discovery and exploration. In particular, the model will be used to create metadata for the datasets in order to facilitate:
- the discovery and exploration of the CYBELE datasets and
- the description of the data needs of CYBELE apps.
The CYBELE Common Semantic Model will serve as a common reference model for the semantic annotation and sharing of CYBELE demonstrators data supporting the on demand data discovery and exploration. In particular, it will be used to create metadata for the datasets (e.g. data theme, spatial/temporal coverage, data format, periodicity, licence). The semantic annotation of the data will facilitate:
- The discovery and exploration of the CYBELE datasets. The component “Query Builder” will use the semantic model to formulate queries in order to identify available datasets that cover the users’ needs (e.g. "data of area X at the time frame [2018 - 2019] that contain data for soya yield".)
- The description of the data needs of CYBELE apps. CYBELE will produce apps that can be reused in different context using different data. The semantic model will describe the requirements that the data should match in order to be compatible with the created apps (e.g. the data should have a spatial and temporal dimension)
The design and implementation of the model is based on the user stories and requirements documented in deliverable D1.2. The user stories and the requirements are further analyzed and specialized for the needs of this deliverable. Additionally, the design of the CYBELE Common Semantic Model re-uses existing models and vocabularies such as DCAT, StatDCAT, GeoDATC, INSPIRE, SSN ontology, QB vocabulary and PROV-O. The model is also applied to the demonstrators data in order to check its completeness.
### Model description
The main class of the model is the `Dataset`. The `Dataset`:
- is part of a `Catalog` that contains many datasets,
- is published by a `Publisher` that can be a person or an organization
- is available through a `Distribution` (e.g. download file, data service) and
- is the result of an `Activity` that involves `Agents` (e.g. human sensor).
The `Dataset` has also properties including the `Theme`, `Language`, `Issuing`/`Modification` date, `Update frequency`, `Measure`, `Unit of measure`, `Dimension`. `Spatial`/`Temporal coverage`, `Spatial`/ `Temporal resolution`, `Standard` and `Web page`. Finally, the `Distribution` has properties including the `License`, `Format` and `Download URL`.
![CYBELE Common Semantic Model](/images/model_matching.jpg)
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