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Angelo Veltens avatar

Angelo Veltens

Community

@angelo-v · Hamburg

79Followers
|
92Public Repos
|
10Published Skills

Software developer & IT consultant at codecentric.

🐙 GitHub ↗🌐 Website ↗
Skills Distribution
DomainData Systems...Knowledge Graphs &.. (45%)SPARQL Querying & .. (30%)Ontology & Vocabul.. (15%)Web Application Sc.. (10%)

Agent Skills by Angelo Veltens

Showing 10 vetted skills indexed across 1 GitHub repositories.

angelo-vangelo-v

spa-html

Creates single-page web apps as self-contained HTML files using Lit, WebAwesome, and CDN-only dependencies.

Community
Advanced
angelo-vangelo-v

adr

Creates Architecture Decision Records in MADR format through interactive questionnaires.

Community
Intermediate
angelo-vangelo-v

sparql-query-endpoint

Executes SPARQL 1.1 queries against remote endpoints using Comunica.

Community
Intermediate
angelo-vangelo-v

sparql-query-wikidata

Query live Wikidata facts via SPARQL using entity search and domain-specific property sets.

Community
Advanced
angelo-vangelo-v

rdf-validate

Validates RDF data graphs against SHACL shapes and reports constraint violations.

Community
Intermediate
angelo-vangelo-v

rdf-memory

Persist and query RDF knowledge graphs across sessions using an Oxigraph-backed store.

Community
Advanced
angelo-vangelo-v

rdf-write

Writes validated RDF data to Turtle, JSON-LD, N-Triples, and N-Quads files.

Community
Intermediate
angelo-vangelo-v

ontology-design

Guides design of OWL ontologies and SKOS vocabularies with Turtle templates and validation rules.

Community
Intermediate
angelo-vangelo-v

linked-data-fetch

Dereferences Linked Data URIs and follows owl:sameAs and rdfs:seeAlso links.

Community
Basic
angelo-vangelo-v

sparql-query-files

Executes SPARQL 1.1 queries against local RDF and Turtle files using Comunica.

Community
Intermediate

Frequently Asked Questions About Angelo Veltens

FAQPage Schema
What tasks can I accomplish with Angelo Veltens' skills?▼

You can query SPARQL endpoints and local RDF files, fetch live Wikidata facts, dereference Linked Data URIs, validate RDF against SHACL shapes, design OWL ontologies and SKOS vocabularies, persist knowledge graphs in Oxigraph, write Turtle/JSON-LD files, scaffold single-file web apps, and record MADR architecture decisions.

Who are these skills designed for?▼

Semantic web engineers, knowledge graph developers, ontology designers, and data architects working with RDF, SPARQL, OWL, SKOS, and SHACL. They also suit front-end developers building lightweight single-page HTML apps and software architects documenting decisions in MADR format.

How do the SPARQL querying skills work in practice?▼

The sparql-query-endpoint and sparql-query-files skills run SPARQL 1.1 SELECT, ASK, CONSTRUCT, and DESCRIBE queries via the Comunica engine, targeting either remote HTTP endpoints such as DBpedia or local .ttl, .rdf, and .n3 files in the workspace.

What are the prerequisites and dependencies?▼

Skills rely on specific runtimes named in their manifests: Comunica for SPARQL execution, Oxigraph for persistent quad storage, rdf_validate for SHACL checking, and ld_fetch for URI dereferencing. The spa-html skill uses CDN-only dependencies including Lit, WebAwesome, and Pollen.

Can these skills keep data across sessions?▼

Yes. The rdf-memory skill persists RDF facts in an Oxigraph-backed store that survives session restarts, letting you build a knowledge base incrementally and run SPARQL queries against it. Facts are written via rdf_memory_record, which stamps datetimes and enforces the quad/RDF-star model.