Execute SQL, SPARQL, SPASQL, SPARQL-FED, and GraphQL queries against live data spaces and knowledge graphs via OpenLink's OpenAPI-compliant web services. Use this skill whenever the user wants to query a database, RDF store, or SPARQL endpoint; explore a knowledge graph or data space; asks "How to ...", "Define the term ...", or poses a question against a known article or graph context; or mentions linkeddata.uriburner.com, Virtuoso, OPAL, or OpenLink services. Full query templates are in references/query-templates.md — load that file before constructing any predefined query.
Record screencast videos of web application interactions using shot-scraper video. Use when the user says: record a screencast, record a video demo, make a walkthrough of, record this session, record what you just did, add voice-over narration, or mix narration into a screencast. Handles mTLS-authenticated endpoints (linkeddata.uriburner.com:5443), local dev server demos, after-the-fact recording from curl session history, optional OpenAI TTS MP3 generation, and dual-format storyboards: YAML (native input for shot-scraper) and RDF Turtle (optional input, auto-generated session log).
Perform ActivityPub read/write operations against Fediverse instances (Note, Like, Announce, Follow, Delete, Undo). Handles OAuth Authorization Code flow, WebFinger resolution, ActivityPub content negotiation, and server-to-server delivery verification.
Assemble or exercise OPAL Agents and Skills. Trigger on phrases like 'assemble an agent', 'create an AGENTS.md', 'build a skill', 'exercise an agent', 'test a skill', 'list OPAL agents', 'instantiate an agent', or any request to work with OPAL agents, skills, or function tools.
Generate sophisticated, interactive HTML infographics and optional Markdown companion documents from RDF data in any format (Turtle, RDF/XML, N-Triples, JSON-LD). Transform knowledge graphs into visually stunning, data-driven narratives with advanced CSS effects, dynamic interactions, floating navigation, smooth animations, comprehensive metadata, and Markdown variants when requested. Use when converting RDF datasets or SPARQL results into engaging, responsive infographic pages, Markdown companions, marketing assets, documentation, or knowledge exploration artifacts.
Bulk-load RDF archives (N-Triples, Turtle, RDF/XML, N-Quads, TriG, JSON-LD, Notation3 — gzip-compressed or raw) into a Virtuoso instance via isql, using ld_dir + rdf_loader_run. Covers single-file loads, directory-wide ingestion, load monitoring, named-graph management (clear/replace/append), and troubleshooting. Triggers on phrases like "load this RDF into Virtuoso", "bulk load into Virtuoso", "ingest .nt.gz into Virtuoso", or any request to push RDF data to a Virtuoso SPARQL endpoint via isql.
Generate, verify, and manage Web-scale verifiable digital identities (NetIDs) using semantic web standards. Produces self-signed X.509 certificates, WebID profile documents (Turtle, JSON-LD, RDFa HTML), identity card HTML pages with optional OPAL AI widget, vCard VCF, and complete linked-data identity bundles. Uploads identity documents to WebDAV/LDP endpoints via curl. Verifies existing WebID profiles by fetching and executing SPARQL queries against URIBurner. Triggers on phrases like "generate a NetID", "create a YouID identity card", "generate a WebID profile for", "create a WebID profile", "verify WebID", "verify identity at", "generate X.509 certificate for", "upload identity documents to", "delegate identity for", "what is a NetID", "define WebID", "explain YouID", "self-sovereign identity", "digital identity card", "WebID-TLS", "DPKI certificate". Compatible with the OpenLink YouID browser extension.
Generate RDF-Turtle descriptions (schema:ImageObject, schema:VideoObject, schema:WebPage) for infographic files in a WebDAV directory, using SHACL shapes as the property contract. Trigger when: user asks to describe infographics, generate metadata for a DAV directory, create RDF descriptions for image/video collections, or apply a SHACL shape to bulk-describe files. Handles content negotiation (HTML describe pages vs SPARQL DESCRIBE), filename-derived metadata, thumbnail URL detection, and category inference.