Analyze the server's own usage logs for patterns and errors.

Args: None

Returns:

• total_calls: Total number of tool invocations

• tool_breakdown: Calls per tool

• recent_errors: Last 5 distinct errors

• last_activity: Most recent timestamp

Browse concepts in a vocabulary with pagination support.

Args:

• schemeUri: URI of the ConceptScheme

• limit: Items per page (default: 50)

• offset: Items to skip (default: 0)

• keyword: (optional) Filter by label

• lang: "it" | "en" | "any" (default: "any")

Returns:

• concepts: List of concepts with code and label

• pagination: Total count, offset, has_more

When to use this vs X:

• vs search_in_vocabulary: this is the preferred default for exploring a known ConceptScheme because it supports pagination and optional keyword

• use search_in_vocabulary only for a lightweight keyword lookup when pagination is not needed

Use for: Large vocabularies that need pagination (e.g., ICD codes, municipalities)

Analyze usage coverage of a specific class or property, or get global stats.

Args:

• targetUri: (optional) URI of class or property to check

Returns:

• If targetUri provided: instance count and properties used

• If no targetUri: top 50 types by instance count

Examples:

• No args: Global coverage statistics

• targetUri="http://...#Person": Coverage for Person class

How to interpret the two modes:

• without targetUri = heatmap of the catalog, useful to see which types are most used overall

• with targetUri = targeted coverage analysis for one URI

Identify potential overlaps (same labels) or explicit mappings.

Args:

• limit: Maximum results to return (default: 50)

Returns:

• List of potential overlaps with relation type:

  • owl:sameAs mappings

  • skos:exactMatch mappings

  • Same Label collisions

Verify quality issues like missing labels or descriptions.

Args:

• limit: Maximum results to return (default: 50)

• ontologyUri: (optional) Restrict check to resources whose URI starts with this ontology namespace. Use this to avoid false positives from resources imported from other ontologies (e.g. core ontology classes referenced as range/domain in the target ontology). Mirrors the URI prefix heuristic used by explore_ontology.

Returns:

• List of resources missing rdfs:label or skos:prefLabel (checked in both default graph and all named graphs)

When to use ontologyUri:

• Pass the ontology URI (from list_ontologies) when checking a specific ontology to exclude imported resources. Resources imported from another ontology (e.g. a core class used as range) are NOT a quality issue of the importing ontology — they are defined, with their labels, in the originating ontology.

Note: Checks owl:Class, owl:ObjectProperty, owl:DatatypeProperty, and skos:Concept. Label lookup spans both the default graph and all named graphs to avoid false positives caused by label triples residing in a named graph different from where the type assertion was found.

False positive filtering: Resources that have only a bare type declaration (a owl:Class with no other properties) are automatically excluded. These are typically import stubs — classes or properties referenced from another module but never developed locally. Only resources with at least one non-type triple are flagged, ensuring the report covers entities that are being actively developed but are missing editorial metadata.

Gap analysis: compare schema.gov.it semantic resources against the international OKG catalog for a given domain.

How it works:

1. Fetches OKG resources for the given category

2. For resources that have a Wikidata ID, queries schema.gov.it for matching owl:sameAs / skos:exactMatch links

3. Classifies each OKG resource as "covered" (linked in schema.gov.it) or "gap" (not linked)

Args:

• category: OKG thematic category to analyze

• limit: Max OKG resources to fetch (default: 50)

Returns:

• summary: total, covered count, gap count, coverage percentage

• covered: OKG resources already linked in schema.gov.it (with local URI and relation type)

• gaps: OKG resources with no corresponding link in schema.gov.it

• without_wikidata: OKG resources without a Wikidata ID (cannot be cross-referenced automatically)

Available categories: fetched dynamically from api.openknowledgegraphs.com at runtime.

Use when: Assessing which international standards are missing in schema.gov.it for a specific domain, or prioritizing new ontology and vocabulary contributions.

Compare classes and/or properties defined in an ontology available on the server filesystem or through HTTP upload against schema.gov.it.

Args (provide exactly one of file_path or upload_id):

• file_path: Absolute path on the MCP server filesystem. Use only if the server can really read that path.

• upload_id: UUID returned by POST /upload. Use this in HTTP/remote mode when the ontology file is not present on the server.

• type: What to compare — "classes" | "properties" | "all" (default: "classes")

• limit: Max local items to check (default: 50)

Important for remote MCP servers:

• file_path is not a transport mechanism. It works only for files visible to the server process.

• If the ontology sits on the client machine, call get_upload_instructions, execute the curl command via Bash tool (without reading the file), then use the upload_id here.

• Never copy ontology text into the conversation — use get_upload_instructions + Bash tool to send bytes directly.

Returns:

• matched: URIs found in both local file and schema.gov.it (with Italian label if available)

• local_only: URIs defined locally but absent from schema.gov.it

• summary counts

Use when: Starting to build an ontology — quickly discover which of your classes/properties already exist in schema.gov.it so you can reuse or align them.

Get all triples for a resource (Concise Bounded Description).

Args:

• uri: URI of the resource

• depth: 1 for direct properties only, 2 to include linked resources (default: 1)

Returns:

• All properties and values of the resource

When to use this vs X:

• vs inspect_concept: use this when you need the raw RDF description of a resource; use inspect_concept when you want a semantic profile with hierarchy, usage, and inherited properties

• vs query_sparql: use this for the standard CBD dump of one resource; use query_sparql only for custom graph patterns not covered here

Use when: You need the complete RDF description of a specific resource.

List named graphs and ontologies available in the endpoint.

Args: None

Returns:

• graphs: List of named graphs in the endpoint

• ontologies: List of owl:Ontology and skos:ConceptScheme resources

When to use this vs X:

• use this for a quick structural overview of the endpoint

• use list_ontologies or list_vocabularies when you want richer, more task-oriented views of ontologies or vocabularies

Note: This tool returns TWO lists in one call (named graphs + ontology/vocabulary resources). Both queries run in parallel for performance.

List available classes in the ontology with instance counts.

Args:

• limit: Maximum number of classes to return (default: 50)

• filter: Optional regex filter for class URI (case-insensitive)

Returns:

• List of classes with instance counts, ordered by count descending

Examples:

• No args: Returns top 50 classes by instance count

• filter="Person": Returns classes containing "Person" in URI

Get details of a specific Dataset including metadata and distributions.

Use this for targeted DCAT-AP_IT inspection. On schema.gov.it, many datasets describe semantic assets, so this tool is usually secondary to ontology, vocabulary, class/property, and SPARQL exploration.

Args:

• datasetUri: URI of the dataset to explore

Returns:

• metadata: Dataset properties (literals and distribution references)

• distributions: List of distributions with format and download URLs

Note: Both queries run in parallel for performance.

Explore the structure of an external SPARQL endpoint: discover its main classes and instance counts.

Args:

• endpointUrl: URL of the SPARQL endpoint to explore (must be HTTPS)

• limit: Maximum number of classes to return (default: 20)

Returns:

• List of classes with instance counts, ordered by count descending

Security: Only HTTPS endpoints are allowed. Requests timeout after 15 seconds.

Use when: Getting a quick overview of what data an external endpoint contains before writing detailed queries.

List Classes and Properties defined in a specific Ontology.

Args:

• ontologyUri: URI of the ontology (from list_ontologies)

Returns:

• List of classes and properties with labels, grouped by type

Note: Uses URI prefix heuristic - items whose URI starts with the ontology URI.

Find all alignment links from a concept in schema.gov.it toward external resources.

Args:

• uri: URI of the concept in schema.gov.it

Returns:

• concept: The queried URI

• alignments: List of external URIs with relation type and domain (base URL)

Alignment types searched:

• owl:sameAs (bidirectional)

• skos:exactMatch

• skos:closeMatch

• skos:broadMatch

• skos:narrowMatch

Use when: Understanding how a local concept maps to external systems (Eurostat, DBpedia, EU Publications Office, etc.)

Given a schema.gov.it URI, find related resources in the Open Knowledge Graphs catalog.

How it works (3 steps):

1. Queries schema.gov.it for the resource's label and any Wikidata alignments (owl:sameAs, skos:exactMatch)

2. Searches OKG using the resource label

3. Cross-references OKG results: those whose wikidataId matches a known alignment are "confirmed matches"; the rest are "candidates" (label-based, need manual review)

Args:

• uri: URI of a schema.gov.it concept, class, or vocabulary

Returns:

• label: The label used for OKG search

• wikidata_alignments: Wikidata URIs already present in schema.gov.it for this resource

• okg_matches: OKG resources with a confirmed Wikidata alignment (high confidence)

• okg_candidates: OKG resources found by label search only (lower confidence)

Use when: Discovering international equivalents of a local ontology or vocabulary, or checking whether a schema.gov.it concept is represented in global semantic standards.

Given a property URI, find its range class and any associated SKOS ConceptSchemes in the catalog.

Args:

• property_uri: URI of the property (e.g. 'https://w3id.org/italia/onto/COV/hasCategory')

Returns:

• range: the rdfs:range of the property (if declared)

• instance_count: number of instances of the range type in the catalog

• schemes: SKOS ConceptSchemes whose members are typed as the range class

• suggestion: actionable advice (use existing scheme, or create a local one)

Use when: You want to know what controlled vocabulary values to use for a property, or whether an official ConceptScheme exists.

Find how two concepts are connected.

Args:

• sourceUri: URI of the source concept

• targetUri: URI of the target concept

• max_hops: 1 | 2 | 3 (default: 1)

Returns:

• Direct connections (single predicate)

• Multi-hop paths up to the configured depth

Search the Open Knowledge Graphs catalog for semantic web software tools.

OKG indexes semantic tools such as ontology editors, SPARQL engines, vocabulary managers, RDF converters, and reasoning engines — with version and release metadata. Data is CC0.

Args:

• query: Search term (e.g. "SPARQL", "ontology editor", "SKOS", "RDF converter", "reasoner")

• limit: Maximum results (default: 10)

Returns:

• List of tools with title, description, latestVersion, releaseDate, homepage, licenses

Use when: Looking for open-source tools to validate ontologies, work with SKOS/OWL/RDF data, or build semantic applications on top of schema.gov.it content.

Get comprehensive details of a specific property from schema.gov.it, with explicit raw vs effective views.

Args:

• propertyUri: URI of the property

• mode: "raw" | "effective" (default: "effective")

• source: "schema" | "local" | "hybrid" (default: "schema")

• file_path / content / upload_id: local context when source="local" or source="hybrid"

Tip: Use search_concepts first if you do not know the URI.

mode: "raw" — only explicitly asserted triples:

• definition: type, label, comment, rdfs:domain, rdfs:range, rdfs:subPropertyOf, owl:inverseOf, functional flags

mode: "effective" (default) — full inherited view, adds:

• assertedDomain: rdfs:domain declared directly on this property

• assertedRange: rdfs:range declared directly on this property

• superproperties: ancestor chain via rdfs:subPropertyOf+, each with hasDomainLocally / hasRangeLocally flags

• inheritedDomain: domain values from super-properties, each annotated with ancestor URI and label

• inheritedRange: range values from super-properties, each annotated with ancestor URI and label

• effectiveDomain: deduplicated union of assertedDomain + inheritedDomain

• effectiveRange: deduplicated union of assertedRange + inheritedRange

• redundancy_analysis: diagnostic view of each asserted value:

  • "redundant": identical to an inherited value — the axiom can be dropped without semantic loss

  • "specialization": a rdfs:subClassOf of an inherited value — genuinely narrows the domain/range

  • "new": not present in any inherited value — adds information not implied by the super-property chain

  • summary counts per category for quick overview

Interpreting the output:

• If assertedDomain is empty but effectiveDomain is not → domain is inherited; no need to re-assert it on this property

• If assertedDomain equals effectiveDomain → the domain is fully explicit, not relying on inheritance

• Use redundancy_analysis.summary to immediately see if the local TTL has redundant axioms or genuine specializations

• owl:equivalentProperty and owl:equivalentClass expansions are not included (use query_sparql for those)

Hybrid mode:

• source="hybrid" uses the local/uploaded ontology as the base graph

• it enriches missing super-property semantics from schema.gov.it when a super-property URI is known locally but absent from the local store

• it still does not build a generic unified graph or guarantee full owl:imports resolution

When to use this vs X:

• vs inspect_local_property: use this for a property already published in schema.gov.it; use inspect_local_property for a local/uploaded ontology

• vs query_sparql: use this for the standard semantic profile of one property; use query_sparql only for custom questions not covered here

Returns the exact curl command to upload a local RDF file to this MCP server and get back an upload_id — without the AI ever reading the file content.

CRITICAL — how to use this tool:

1. Call this tool with the local file path

2. Execute the returned curl_command via the Bash tool (do NOT read the file first, do NOT pass its content through the conversation)

3. Parse the id field from the curl JSON output

4. Pass the id as upload_id to inspect_local_ontology, query_local_ontology, compare_local_with_remote, or query_uploaded_store

Why this matters: Reading the file and sending its content through the AI conversation wastes tokens and may hit context limits. curl sends the raw bytes directly from the filesystem to the server — the AI never sees the content.

When to use this vs X:

• use this only when the file is on the client machine and the MCP server cannot read it directly

• if the server can already read the file, prefer file_path on the local ontology tools

• if the file is small and you only need a quick summary, inspect_local_ontology with content + format may be enough

HTTP mode only: This workflow requires the MCP server to be running in HTTP mode (MCP_TRANSPORT=http). In stdio mode the HTTP endpoint is not available; use the content parameter of inspect_local_ontology for small files instead.

Docker / reverse-proxy: Set the MCP_PUBLIC_URL env var to the externally reachable base URL (e.g. http://localhost:8080). Without it, the tool falls back to the internal bind address which may be unreachable from outside the container.

Supported formats: .ttl (Turtle), .owl/.rdf (RDF/XML), .nt (N-Triples), .jsonld (JSON-LD), .graphol (Graphol XML)

Uploaded stores expire after 1 hour.

Get a comprehensive profile of a concept from schema.gov.it, with explicit raw vs effective views.

Args:

• uri: URI of the concept to inspect

• mode: "raw" | "effective" (default: "effective")

• source: "schema" | "local" | "hybrid" (default: "schema")

• file_path / content / upload_id: local context when source="local" or source="hybrid"

• lang: "it" | "en" | "any" (default: "any")

Tip: Use search_concepts first if you do not know the URI.

mode: "raw" — only explicitly asserted triples:

• definition: literal annotations (label, comment, definition…)

• hierarchy: direct type, parent classes (rdfs:subClassOf / skos:broader), child classes

• usage: instance count

• own_properties: properties with rdfs:domain exactly this class

mode: "effective" (default) — full OWL/RDFS-implied view, adds:

• inherited_properties: properties from ancestor classes via rdfs:subClassOf+/skos:broader+, each row annotated with the ancestor that declares domain (distinguishes asserted-on-this-class from inherited)

• incoming: properties pointing to instances of this type (data-level)

• outgoing: properties used by instances of this type (data-level)

Interpreting own vs inherited:

• own_properties = rdfs:domain written explicitly for this class → if missing, the property may still apply via inheritance

• inherited_properties = rdfs:domain written on an ancestor → redundant to re-assert on this class unless restricting range

• A property absent from both may still apply via owl:restriction, owl:equivalentClass, or owl:unionOf/intersectionOf (not shown — use query_sparql for those cases)

Limitations of effective mode:

• owl:equivalentClass: not expanded (equivalent classes share all properties but this tool shows only the rdfs:subClassOf chain)

• owl:unionOf / owl:intersectionOf: not traversed (anonymous class expressions)

• owl:imports: schema.gov.it resolves these server-side; the endpoint already includes imported triples

Hybrid mode:

• source="hybrid" uses the local/uploaded ontology as the base graph

• for effective mode it enriches missing inherited properties and labels from schema.gov.it when ancestor URIs are known locally

• it does not create a fully unified graph and does not resolve arbitrary owl:imports chains

When to use this vs X:

• vs inspect_local_concept: use this for concepts already in the remote schema.gov.it catalog; use inspect_local_concept for a local/uploaded ontology

• vs describe_resource: use this for a semantic profile (hierarchy, inherited properties, usage); use describe_resource for the raw RDF dump of a resource

• vs query_sparql: use this when you want the standard profile of one concept; use query_sparql only for custom questions not covered here

All queries run in parallel for performance.

Get a full profile of a class or concept from a local or uploaded ontology.

CRITICAL — file access workflow:

1. Try file_path first (works only if the file is readable by the MCP server process).

2. If file_path fails for any reason → call get_upload_instructions with the local path, execute the returned curl command via Bash tool, parse the id from the JSON response, then call this tool again with upload_id.

3. NEVER read the file content and pass it through the conversation. NEVER attempt to parse or analyse the TTL text manually. The upload workflow sends raw bytes directly from disk to server without the AI ever seeing the content — it is always faster, cheaper, and more reliable.

Quale modalita di input usare:

• stdio / stessa macchina → file_path

• server remoto, file grande → get_upload_instructions + upload_id

• server remoto, file piccolo (<1 MB) → valuta content + format con inspect_local_ontology, poi passa a upload se servono query ripetute

Args:

• uri: URI of the class/concept to inspect

• file_path / upload_id: exactly one (see workflow above)

• mode: "raw" | "effective" (default: "effective")

Tip: Use search_concepts first if you are checking whether a similar concept already exists in schema.gov.it. Use this tool only after you know you want to inspect the local/uploaded ontology.

mode: "raw" — only triples explicitly present in the local file:

• definition, hierarchy, usage, own_properties (rdfs:domain asserted directly on this class)

• No ancestor traversal, no incoming/outgoing

mode: "effective" (default) — full OWL/RDFS-implied view:

• All raw sections, plus:

• inherited_properties: properties from superclasses via rdfs:subClassOf+/skos:broader+, each annotated with the ancestor that declares them

• incoming / outgoing: data-level relations via instances

Distinguishing own vs inherited:

• own_properties = rdfs:domain explicitly written as this class in the local file

• inherited_properties = rdfs:domain written on an ancestor class (traversed via property paths)

• Properties applicable only via owl:restriction or anonymous class expressions are NOT shown — use query_local_ontology for those

Limitation with owl:imports: inherited_properties traverses only superclasses present in the local file. Classes from imported external ontologies (e.g. l0:, COV:, CPV:) are absent from the local store unless the file includes them. For complete property semantics of a property that subPropertyOf an external one, use inspect_local_property instead — it falls back to schema.gov.it for missing super-properties.

When to use this vs X:

• vs inspect_concept: use this for a local or uploaded ontology; use inspect_concept for the remote schema.gov.it catalog

• vs query_local_ontology: use this when you want the standard profile of one concept; use query_local_ontology only for custom SPARQL questions not covered here

Unicode SPARQL note: oxigraph rejects prefixed names with non-ASCII local parts (e.g. myont:modalità_cup). Always use full URIs in angle brackets (<https://...#modalità_cup>) for properties or classes with Unicode in the local name.

Load and summarize an RDF/OWL ontology from the server filesystem, inline content, or an uploaded HTTP store (TTL, OWL/RDF-XML, NT, JSON-LD, Graphol XML).

Input (provide exactly one):

• file_path: Absolute path on the MCP server filesystem. Use this only when the server process can really read that path (local stdio, same machine, or Docker with that directory mounted).

• content + format: Raw RDF text sent inline. Works in remote HTTP mode too, but only for small payloads (max 1 MB).

• upload_id: UUID returned by POST /upload. This is the preferred remote workflow when the ontology file is on the client machine instead of the server.

Important for remote MCP servers:

• Do not assume file_path points to the user's laptop or local workstation.

• If the MCP server runs on another machine/container and cannot access the file directly, call get_upload_instructions first, execute the returned curl command via Bash tool (do NOT read the file), then use the upload_id here.

• Prefer upload_id over trying many path variants when access to the original file is uncertain.

• Never read the file content and relay it through the conversation — this wastes tokens. Use get_upload_instructions + Bash tool instead.

format values: "text/turtle" (default), "application/rdf+xml", "application/n-triples", "application/ld+json", "application/graphol+xml"

Returns:

• File info: format, triple count, source

• Classes: defined owl:Class / rdfs:Class with instance counts (top 20)

• Properties: count of object and datatype properties

• Namespaces used

Efficiency: file_path results are cached by mtime; repeated calls on unchanged files skip re-parsing.

Get the full semantic profile of a property from a local or uploaded ontology, resolving inherited domain and range via rdfs:subPropertyOf+.

CRITICAL — file access workflow:

1. Try file_path first (works only if the file is readable by the MCP server process).

2. If file_path fails for any reason → call get_upload_instructions with the local path, execute the returned curl command via Bash tool, parse the id from the JSON response, then call this tool again with upload_id.

3. NEVER read the file content and pass it through the conversation. NEVER attempt to parse or analyse the TTL text manually. The upload workflow sends raw bytes directly from disk to server without the AI ever seeing the content — it is always faster, cheaper, and more reliable.

Quale modalita di input usare:

• stdio / stessa macchina → file_path

• server remoto, file grande → get_upload_instructions + upload_id

• server remoto, file piccolo (<1 MB) → valuta content + format con inspect_local_ontology, poi passa a upload se servono query ripetute

Tip: Use search_concepts first if you are checking whether an equivalent property already exists in schema.gov.it. Use this tool only after you know you want to inspect the local/uploaded ontology.

Returns:

• definition: direct attributes from the local store (type, label, comment, subPropertyOf, inverseOf, functional flags)

• assertedDomain: rdfs:domain declared directly on this property in the local file

• assertedRange: rdfs:range declared directly on this property in the local file

• superproperties: ancestor chain via rdfs:subPropertyOf+; each entry has source:

  • "local" = found in the local store

  • "remote" = not in local file, resolved from schema.gov.it

  • "not-found" = absent from both

• inheritedDomain: domain values collected from super-properties, each annotated with ancestor URI and source

• inheritedRange: range values collected from super-properties, each annotated with ancestor URI and source

• effectiveDomain: deduplicated union of assertedDomain + inheritedDomain

• effectiveRange: deduplicated union of assertedRange + inheritedRange

• redundancy_analysis: diagnostic view of each asserted value:

  • "redundant": identical to an inherited value — the axiom can be dropped without semantic loss

  • "specialization": a rdfs:subClassOf of an inherited value — genuinely narrows the domain/range

  • "new": not present in any inherited value — adds information not implied by the super-property chain

• summary counts per category for quick overview

• warnings: super-properties not resolved, remote lookup failures

owl:imports handling: The local store typically does NOT contain imported ontologies (owl:imports declarations are not followed automatically). Super-properties from external namespaces (e.g. l0:name, l0:description from OntoPiA) are resolved against schema.gov.it automatically, making the effective semantics complete without requiring the full import chain to be loaded.

Use case — subproperty chains: For properties like ha_cup_collegato_per_fusione rdfs:subPropertyOf ha_cup_collegato, this tool shows whether domain/range are asserted directly, inherited from ha_cup_collegato, or need remote resolution. For subPropertyOf l0:name, it fetches l0:name's domain/range from schema.gov.it and shows it as source "remote".

When to use this vs X:

• vs get_property_details: use this for a local or uploaded ontology; use get_property_details for a property already published in the remote schema.gov.it catalog

• vs query_local_ontology: use this when you want the standard semantic profile of one property; use query_local_ontology only for custom SPARQL questions not covered here

Unicode SPARQL note: oxigraph rejects prefixed names with non-ASCII local parts. For properties with Unicode in the local name (e.g. myont:modalità_cup), always pass the full URI in angle brackets (<https://...#modalità_cup>).

List available Datasets (dcatapit:Dataset) in the catalog.

Use this when you explicitly need DCAT-AP_IT dataset records. On schema.gov.it, these are often semantic assets such as ontologies, controlled vocabularies, and related distributions rather than classic tabular datasets, so ontology/vocabulary/SPARQL tools are usually a better starting point.

Args:

• limit: Maximum datasets per page (default: 20)

• offset: Number of datasets to skip (default: 0)

Returns:

• items: List of datasets with labels

• pagination: Metadata with count, offset, has_more, next_offset

List CLV Identifier resources by type, with counts and sample values.

Args:

• identifierType: (optional) Filter by identifier type string (e.g. "Codice Catastale", "Sigla Automobilistica")

• limit: Maximum results (default: 20)

Returns:

• If no identifierType: Summary of all identifier types with counts

• If identifierType provided: Sample identifiers of that type with their values and linked entities

Use when: Exploring the clv:Identifier resources and their identifierType values in the triplestore.

List instances of a given class in the catalog.

Args:

• class_uri: URI of the class (e.g. 'https://w3id.org/italia/onto/COV/PublicOrganization')

• limit: Items per page (default: 20, max: 200)

• offset: Items to skip (default: 0)

Returns:

• instances: list of URIs with labels

• pagination: total count, offset, has_more

Use when: You found a class and want to know if it has real instances (i.e., whether it is used in the catalog, not just defined theoretically).

Discover SPARQL endpoints referenced in the schema.gov.it catalog via dcat:DataService.

Args: None

Returns:

• List of data services with endpoint URL, title, description, and conformsTo standard

Use when: Exploring what external SPARQL endpoints are connected to the Italian PA semantic catalog.

Browse Italian municipalities (comuni) with their codes.

Args:

• limit: Items per page (default: 50, max: 500)

• offset: Items to skip (default: 0)

• keyword: (optional) Filter by name (case-insensitive)

• withBelfiore: (optional) If true, include Belfiore/cadastral codes via URI extraction (slower)

• lang: "it" | "en" | "any" (default: "any")

Returns:

• municipalities: List of cities with ISTAT code, name, and optionally Belfiore code

• pagination: Total count, offset, has_more

Note: Uses BIND+REPLACE URI extraction for Belfiore codes to avoid Virtuoso timeout on identifierType joins. Each ISTAT code may appear with multiple historical names; results are deduplicated by notation.

Fetch the available thematic categories from the Open Knowledge Graphs (OKG) catalog.

Returns: List of category names that can be used as filters in search_okg_resources and compare_coverage_with_okg.

Use when: You need to know which categories are available before filtering OKG searches.

List available Ontologies (Data Models) and their titles.

Args:

• limit: Maximum number of ontologies to return (default: 50)

• normalize_trailing_slash: If true, merge ontology IRIs that differ only by a final "/" (default: true)

• include_variants: If true and normalization is enabled, include raw URI variants to expose catalog inconsistencies

Returns:

• List of ontology URIs with labels/titles, ordered alphabetically

Note: Some ontologies are duplicated in the catalog with and without a trailing slash. By default this tool normalizes them, but you can inspect the raw variants when cleaning the catalog.

List ObjectProperty and DatatypeProperty defined in an ontology or globally.

Args:

• ontologyUri: (optional) URI of the ontology to filter by

• propertyType: (optional) "object", "datatype", or "both" (default: "both")

• limit: Maximum results (default: 50)

Returns:

• List of properties with domain, range, and label

Examples:

• No args: All properties (top 50)

• ontologyUri="https://w3id.org/italia/onto/CPV": Properties from CPV ontology

List Italian provinces with their codes (ISTAT, car plate, metropolitan city).

Args:

• keyword: (optional) Filter by province name (case-insensitive)

• lang: "it" | "en" | "any" (default: "any")

Returns:

• List of provinces with notation (ISTAT code), name, sigla (car plate), and metro code (if metropolitan city)

Note: Runs 3 parallel queries for names, car plates, and metro codes, then joins client-side. There are ~107 provinces, 14 of which are metropolitan cities.

List available Controlled Vocabularies (ConceptSchemes) and their instance counts.

Args:

• limit: Maximum vocabularies to return (default: 20)

Returns:

• List of ConceptSchemes with labels and concept counts, ordered by count descending

Navigate a SKOS hierarchy upward and/or downward from a concept.

Args:

• uri: Concept URI

• direction: "up" | "down" | "both"

• depth: 1..5

Returns:

• Flat list of related concepts with direction and depth

Use when: You want a dedicated SKOS navigation tool instead of writing custom query_sparql property paths.

Download and preview the first rows of a distribution file.

Most useful after you already identified a concrete distribution URL. On schema.gov.it, distributions often belong to semantic assets rather than classic tabular datasets.

Args:

• url: Download URL of the distribution (CSV or JSON)

Returns:

• Preview of first 10-15 rows/items of data

Supported formats: CSV, JSON (auto-detected by content-type or extension) Timeout: 10 seconds

Execute a SPARQL query against any public HTTPS SPARQL endpoint.

Args:

• endpointUrl: URL of the target SPARQL endpoint (must be HTTPS)

• query: SPARQL query to execute

• injectPrefixes: Whether to inject schema.gov.it standard prefixes (default: false)

Returns:

• Compressed SPARQL results in the same format as internal tools

Security: Only HTTPS endpoints are allowed. Requests timeout after 15 seconds.

Examples:

• Query DBpedia: endpointUrl="https://dbpedia.org/sparql"

• Query EU Publications Office: endpointUrl="https://publications.europa.eu/webapi/rdf/sparql"

When to use this vs X:

• vs query_sparql: use this only for an external HTTPS endpoint; use query_sparql for the built-in schema.gov.it endpoint

• vs explore_external_endpoint: use this when you already know the query you want to run; use explore_external_endpoint first if you just need a structural overview

Do not use this if:

• you want to query schema.gov.it itself → use query_sparql

• you want a curated shortlist of endpoints → use recommend_external_endpoints

• you only need endpoints already linked in the catalog metadata → use list_linked_endpoints

Execute a SPARQL SELECT query against an ontology available on the server filesystem or through HTTP upload.

Quale modalita di input usare:

• stdio / stessa macchina → file_path

• server remoto, file grande → get_upload_instructions + upload_id

• server remoto, file piccolo (<1 MB) → usa inspect_local_ontology con content + format per l'analisi; per query ripetute preferisci upload + upload_id

Args (provide exactly one of file_path or upload_id):

• file_path: Absolute path on the MCP server filesystem. Use only if the server can really read that path.

• upload_id: UUID returned by POST /upload. Use this in HTTP/remote mode when the file is local to the client, not the server.

• query: SPARQL SELECT query

• inject_prefixes: Inject standard prefixes (rdf, rdfs, owl, skos, dct…) — default true

Important for remote MCP servers:

• If a direct file path is not accessible from the server, do not keep retrying with alternative local paths.

• Call get_upload_instructions with the file path, execute the returned curl command via Bash tool (do NOT read the file first), then use the upload_id here.

• Never relay the file content through the conversation — this wastes tokens. curl sends bytes directly from disk to server.

Returns:

• Compressed SPARQL results (tabular for >5 rows, compact for ≤5 rows)

When to use this vs X:

• vs query_sparql: use this for a local/uploaded ontology; use query_sparql for the default remote catalog

• vs query_uploaded_store: prefer this tool when you already have an upload_id; query_uploaded_store is only a thinner upload-specific path

Do not use this if:

• you need a standard profile of a concept or property → use inspect_local_concept or inspect_local_property

• you just need a summary of the ontology → use inspect_local_ontology

Supported formats: .ttl (Turtle), .owl / .rdf (RDF/XML), .nt (N-Triples), .jsonld (JSON-LD), .graphol (Graphol XML) Efficiency: File is cached after first load; repeated queries on the same unchanged file skip re-parsing. Note: Standard prefixes (rdf, rdfs, owl, skos…) are injected automatically unless inject_prefixes=false.

Execute a RAW SPARQL query against schema.gov.it.

Args:

• query: The SPARQL query to execute (prefixes are auto-injected)

• source: "schema" | "local" | "hybrid" (default: "schema")

• file_path / content / upload_id: local context when source="local"

Returns:

• Compressed JSON result (tabular for >5 rows, object array otherwise)

Examples:

• SELECT ?s ?p ?o WHERE { ?s ?p ?o } LIMIT 10

• SELECT ?class (COUNT(?s) AS ?count) WHERE { ?s a ?class } GROUP BY ?class

When to use this vs X:

• vs query_local_ontology: use this for the default remote catalog schema.gov.it; use query_local_ontology for a file/store loaded locally or via upload_id

• vs query_external_endpoint: use this for the built-in schema.gov.it endpoint; use query_external_endpoint only for another HTTPS SPARQL endpoint

• vs specialized tools: use this only when no dedicated tool already covers the task

Do not use this if:

• you need a concept profile → use inspect_concept

• you need property semantics → use get_property_details

• you need to search by keyword without a known URI → use search_concepts

• you need to browse a vocabulary or dataset → use the dedicated vocabulary/dataset tools

Important: raw hybrid SPARQL is not supported yet. Use source="hybrid" only on specialized concept/property tools, not here.

Note: Use this for ad-hoc exploration. Prefer specialized tools for common operations.

Execute a SPARQL SELECT query against a temporary ontology store created via HTTP upload.

Workflow (HTTP mode only):

1. Call get_upload_instructions with the local file path → get the curl command

2. Execute the curl command via Bash tool (file bytes go directly to the server, no AI token consumption)

3. Parse the id from the curl response

4. Use id here to run SPARQL queries, OR pass it as upload_id to inspect_local_ontology, query_local_ontology, compare_local_with_remote

When to use this workflow:

• The MCP server is remote, containerized, or otherwise cannot read the user's local filesystem.

• A previous file_path attempt failed because the path only exists on the client machine.

• You want to send raw file bytes directly without consuming model tokens.

When to use this vs X:

• prefer query_local_ontology with upload_id for the main MCP workflow

• use this only if you already have the upload store id and explicitly want to query that temporary store directly

Deprecated direction: this is an upload-specific shortcut; for new agent flows prefer query_local_ontology with upload_id

Supported Content-Types for upload: text/turtle, application/rdf+xml, application/n-triples, application/ld+json, application/graphol+xml

Notes:

• Uploaded stores are kept for 1 hour then evicted

• Standard prefixes (rdf/rdfs/owl/skos/dct/xsd/dcat/foaf/clv/cpv/l0/sm) are auto-injected

• The same store is also queryable directly via GET /sparql/<id>?query=...

Return a curated list of useful public SPARQL endpoints to pair with schema.gov.it.

Args:

• category: (optional) Filter by endpoint family: "italian-pa", "eu", or "knowledge-graph"

• limit: Maximum results (default: 10)

Returns:

• Curated endpoint recommendations with rationale, suggested use cases, and example query ideas

Use when: You want a high-signal shortlist of external endpoints before using query_external_endpoint or explore_external_endpoint.

Resolve an Italian territorial code to its canonical CLV URI with labels and related URIs.

Args:

• code_type: Type of code: "istat-comune", "istat-provincia", "istat-regione", or "belfiore"

• code: The code value (e.g. "046030" for ISTAT comune, "F205" for Belfiore)

• date: (optional) ISO date string (e.g. "2022-08-12") — noted in output, full temporal filtering not yet implemented

Returns:

• uri: canonical CLV URI

• name: official name

• code_type and code

• related: connected territorial URIs (province for cities, region for provinces)

• date_note: reminder if date was provided

Use when: You have a raw territorial code (ISTAT or Belfiore) and need the official semantic URI to use in JSON-LD or RDF modeling.

Fuzzy search for concepts/classes/properties by keyword.

Args:

• keyword: Search term (e.g. 'amministrazione')

• limit: Maximum results (default: 10)

• resource_type: (optional) Filter by type: "class", "property", "concept"

• ontology_filter: (optional) URI prefix to restrict the search (e.g. 'https://w3id.org/italia/onto/COV/')

• prefer_core: (optional) If true, results from core ontologies (COV, CPV, CLV, l0) are ranked first

• lang: "it" | "en" | "any" (default: "any")

Returns:

• Matching subjects with type and label

When to use this vs X:

• use this when you do not know the exact URI yet

• vs search_in_vocabulary: use this to search across the whole catalog; use search_in_vocabulary or browse_vocabulary only when the ConceptScheme is already known

Use when: You don't know the exact URI of a concept. Use resource_type and ontology_filter to reduce noise.

Search for concepts within a specific Controlled Vocabulary (ConceptScheme).

Args:

• schemeUri: URI of the ConceptScheme (from list_vocabularies)

• keyword: Search term for label matching (case-insensitive regex)

• limit: Maximum results (default: 20)

• lang: "it" | "en" | "any" (default: "any")

Returns:

• Matching concepts with labels and optional notation codes

When to use this vs X:

• vs browse_vocabulary: use this only for a quick keyword search inside a scheme you already know

• browse_vocabulary is usually the better default because it supports pagination and already accepts keyword

Deprecated: Deprecated. Usa browse_vocabulary con il parametro keyword.

Search the Open Knowledge Graphs (OKG) catalog for ontologies, vocabularies, and taxonomies.

OKG indexes 1800+ semantic resources with metadata sourced from Wikidata. All data is CC0.

Args:

• query: Search term (required)

• category: Optional thematic category filter

• type: Optional resource type filter ("Ontology", "ControlledVocabulary", "Taxonomy")

• limit: Maximum results (default: 20)

Returns:

• List of resources with title, wikidataId, description, category, homepage, licenses, types

Available categories: fetched dynamically from api.openknowledgegraphs.com at runtime.

Use when: Discovering international ontologies and vocabularies in a domain before aligning with schema.gov.it resources. Pair with find_okg_alignments or compare_coverage_with_okg.

Analyze the ontology for structural issues.

Args:

• limit: Maximum issues per category (default: 20)

Returns:

• possible_cycles: Classes with mutual rdfs:subClassOf

• unused_classes: Classes with no instances and no subclasses

• properties_missing_domain_or_range: Properties with incomplete domain/range declarations

• large_classes_without_scheme: Classes with >1000 instances and no evidence of skos:ConceptScheme membership

Note: Both analyses run in parallel.

Analyze usage logs to suggest new specialized tools.

Args: None

Returns:

• List of recommendations based on frequently queried types in raw SPARQL

Note: Requires at least 2 queries for the same type to suggest a tool.