🕸 Merweb

Merweb (Mermaid meets Semantic Web) is library and command line interface to generate SHACL shapes and vocabularies from Mermaid class diagrams.

Usage

• Install via npm i -g merweb.
• Execute tool via merweb -f path/to/diagram -s path/to/jsonld. You can try

merweb -f examples/diagram.txt \
  -s shapes.jsonld \
  -b "sc=https://w3id.org/idlab/ns/supply-chain/#" \
  -v "sc=https://w3id.org/idlab/ns/supply-chain/#" \
  -p "swrl=http://www.w3.org/2003/11/swrl#;owl=http://www.w3.org/2002/07/owl#" \
  -c vocab.jsonld

or

merweb -f examples/diagram_with_supertypes.txt \
  -s shapes.jsonld \
  -b "ex=https://example.org/examples#" \
  -v "ex=https://example.org/examples#" \
  -p "swrl=http://www.w3.org/2003/11/swrl#;owl=http://www.w3.org/2002/07/owl#" \
  -c vocab.jsonld

Examples

You can find example diagrams in the folder examples.

Annotations

Memweb reuses one existing Mermaid annotation and uses five new annotations to generate the correct shapes and vocabularies from the class diagrams. Below you can find a table of these annotations.

Annotation	Description	Shape	Vocabulary	Existing or new annotation
@type	The type of a class	Object of sh:targetNode	A rdfs:Class	New
@superTypes	The super-types of a class	N/A	Object(s) of rdfs:subClassOf	New
@extraTypes	The extra types of a class	Object of sh:property with rdf:type as sh:path	A rdfs:Class	New
@label	The label of a class or property	N/A	Object of rdfs:label	New
@comment	The comment of a class or property	N/A	Object of rdfs:comment	New
Cardinality on a class attribute	The cardinality of datatype property	Objects of sh:minCount and sh:maxCount	N/A	New
Cardinality on a relationship between two classes	The cardinality of object property	Objects of sh:minCount and sh:maxCount	N/A	Existing

Please note that the annotations @type, @superTypes, and @extraTypes assume a strict ordering: @type should always be declared before @superTypes and @extraTypes are declared. The internal ordering of the latter two can be arbitrary.

Remove annotations from diagrams

You can remove the annotations starting with @ from diagrams via the -r, --remove-annotations option. The changed diagram is outputted to the terminal.

merweb -f examples/diagram.txt -r

License

This code is copyrighted by Ghent University – imec and released under the MIT license.