italia / daf-semantics

Daf Semantics repository

daf-semantics

The Daf Semantics repository collects some different components, designed for integrating ontologies, RDF data and to provide some different "semantic" functionalities to the DAF platform.

The architecture is internally splitted into some different microservices:

We can thus recognize 4 different areas:

• catalog frontend

  • DAF dataportal is the DAF front-end, where all the datasets are available. It includes a section with information about ontologies/vocabularies, and a page for validating metadata, using a standard validator.
  • katalod [WIP] is the backend for the "catalog" frontend: it exposes some different endpoints to DAF dataportal, designed ad hoc to provide a conventional data and metadata access from the ontologies and controlled vocabularies from the OntoPiA network.
  • semantic_frontend mockup was designed as a first guideline for developing an ontologies/vocabularies catalog front-end
  • OntoPiA-UI a docker image, containing a collection of tools useful for exploring the OntoPiA network of ontologies.

• standardized data ingestion into DAF:

  • ontonethub a component providing indexing/search capabilities for the catalog. The microservice offers a convetional way for annotating incoming datasets.
  • semantic_standardization [POC] a component designed to support a simple normalization of values inside datasets, using the controlled values defined inside the vocabularies of the OntoPiA network.

• RDF / linked data and triplestore

  • kbaselib [WIP] a library collecting several different functionalities, shared between other components. It can be used by its own, providing a simple abstraction over a triplestore, using the standard RDF4J interface.
  • [semantic mapping / triplifier] [WIP] a component for mapping of incoming data (typically from JDBC, or CSV) to RDF, using W3C standards
  • The semantic_manager was designed as the central access point for a subset of emerging use case, and for loading data in both semantic_repository and ontonethub components. The microservice acts more or less as an internal API gateway, and its revision is currently planned.
  • semantic_repository an abstraction over different triplestores (for example: in-memory, virtuoso).

• metadata validation and production

  • semantic_validator [WIP] a component for validating an ontology over DCAT-AP_IT standard
  • semantic_spreadsheet a repository collecting recipes for creating RDF data from spreadsheets, using google refine

OntoPiA The ontologies / controlled-vocabularies network

daf-semantics's Issues

Comments/Proposals on prototype semantic-frontend

We defined a preliminary prototype of the front-end of the catalogue/registry of ontologies and controlled vocabularies. The prototype is reported in the readme of the semantic_frontend directory. Provide comments/feedback/any idea to enhance it. Bear in mind one of the main objectives: to allow more people (expert and non expert users) to become familiar with the data models that will be made available through the catalogue/registry itself.
The Adobe XD file we published can be commented directly through the "Comment as a Guest" function.

Push Vocabulary data to the DAF

As Daf System,
since I need to have meta information about the vocabularies load
I want to receive vocabularies data from the semantic-service

Define Data Format for vocabulary push

We need to define the data model used to send the information about the vocabularies to the DAF

Create the rest endpoint on the catalog to accept vocabularies information

I need to create a controller on the Catalog manager to accept this information. Maybe, it can be a separate microservice if it doesn't have dependencies.