What is virtuoso-rdf-bulk-loader?

A tool that generates SQL scripts for importing RDF files from a local folder into Virtuoso. Virtuoso is a linked-data database, and RDF files describe entities and relationships in formats such as Turtle, N-Triples, RDF/XML, or JSON-LD.

Generating ready-to-run import scripts, loading mixed or compressed RDF files, selecting file patterns, assigning graph IRIs, reloading per-file data, and clearing graphs before loading.

It prepares the repetitive loader commands from the folder and import settings, so the resulting script can be run with Virtuoso's SQL client. It supports either one graph for a directory or a separate named graph for each file.

virtuoso-rdf-bulk-loader — Skill for Claude Code and Codex by OpenLink

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add OpenLinkSoftware/ai-agent-skills --skill virtuoso-rdf-bulk-loader

Clone the repo

git clone --depth 1 https://github.com/OpenLinkSoftware/ai-agent-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader/github.svg)](https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader)

Your own site

<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-bulk-loader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 110 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,085 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00110	$0.01085
Opus 5	$0.00055	$0.00543
Sonnet 5	$0.00022	$0.00217
Haiku 4.5	$0.00011	$0.00109

Measured 12d ago against content hash 659253de03d4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

virtuoso-rdf-bulk-loader scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/generate-bulk-load-sql.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

virtuoso-rdf-bulk-loader/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Virtuoso RDF Bulk Loader — isql loader generation from a source folder

Generate a ready-to-run isql .sql from a local folder of RDF files. Two modes:

Mode	Mechanism	Use for
`dir` (default)	`ld_dir` + `rdf_loader_run` — one named graph for the whole folder; Virtuoso auto-detects format (N-Triples, Turtle, RDF/XML, N-Quads, TriG, JSON-LD, Notation3) and reads gzip/bzip2 natively	Simple bulk ingestion, mixed formats, compressed archives
`per-file`	`TTLP_MT` — one named graph per file (Turtle family: `.ttl`, `.nt`, `.trig`), optional auto prefix-preamble and CLEAR-before-load	Exact per-document graphs (e.g. an agent memory store), re-loadable deltas

Workflow

Elicit (never guess): source folder (must be accessible to the Virtuoso server process — ld_dir registers server-side paths), target graph IRI (dir mode), file pattern or format list.

Generate:

python3 scripts/generate-bulk-load-sql.py \
  --source-dir /path/to/rdf/ \
  --graph https://example.com/my-graph \
  --pattern '*.ttl' \
  --out bulk-load.sql

Run (your credentials, never displayed):

isql 1111 dba <dba-password> -f bulk-load.sql

Monitor (the generated script ends with the load_list check):
```
select * from db.dba.load_list where ll_state <> 2;
```
ll_state 2 = done; rows remaining = still pending/errored (ll_error column).

Verify (generated script ends with per-graph counts):

SPARQL SELECT ?g (COUNT(*) AS ?t) WHERE { GRAPH ?g { ?s ?p ?o } } GROUP BY ?g;

Options (`generate-bulk-load-sql.py`)

Flag	Default	Meaning
`--source-dir`	(required)	Folder containing the RDF files (server-visible path)
`--graph`	`urn:dav:/DAV/home/kidehen/bulk-load/`	Target named graph (dir mode)
`--pattern`	`.`	`ld_dir` pattern, e.g. `.ttl`, `.nt.gz`, `*.nq`
`--formats`	—	Shorthand expanding to patterns, e.g. `ttl,nt,nq`
`--mode`	`dir`	`dir` (ld_dir) or `per-file` (TTLP_MT per document)
`--graph-base`	`urn:dav:/DAV/home/kidehen/bulk-load/`	IRI prefix for per-file graphs (file relpath appended)
`--preamble`	off	per-file mode: prepend store-wide prefix union so prefix-undeclared Turtle loads
`--clear`	off	Emit `SPARQL CLEAR GRAPH` before loading (idempotent re-runs)
`--out`	`bulk-load.sql`	Output path
`--dry-run`	off	Print the script instead of writing

Read the full file on GitHub · 62 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

scripts/generate-bulk-load-sql.py 5.7 KB runs code

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

12d ago First seen · 62 lines · 110 tokens per session scan A 659253de03d4

Subscribe to this mod's changes

virtuoso-rdf-bulk-loader is a skill published in the GitHub repository OpenLinkSoftware/ai-agent-skills (38 stars, last pushed yesterday), licensed MIT. It adds 110 tokens to every session and 1,085 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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