{
  "schema_version": "1.0",
  "canonical_url": "https://transduction.systems/entries/tool_nodica/",
  "release": "0.35",
  "citation": "Taylor, B. P. (2026). Nodica. The Necessary Tangle, release 0.35. https://transduction.systems/entries/tool_nodica/",
  "licence": "CC BY-SA 4.0 for original atlas text and data; linked works retain their own terms",
  "entry": {
    "id": "tool_nodica",
    "label": "Nodica",
    "entity_type": "tool",
    "description": "An open-source RDF graph visualisation developed by Ivo Velitchkov, used here as a comparator for explicit semantics and graph navigation rather than as the atlas's underlying implementation.",
    "aliases": [],
    "boundary_ring": "0",
    "inclusion_reason": "practitioner_expertise_coverage_release_0_12",
    "status": "accepted",
    "source_ids": [
      "src_nodica_repo_2026"
    ],
    "set_tags": [
      "systems",
      "practice",
      "human_lineage",
      "release_0_12"
    ],
    "espoused_labels": [],
    "observed_clusters": [],
    "canonical_definition": "An open-source RDF graph visualisation developed by Ivo Velitchkov, used here as a comparator for explicit semantics and graph navigation rather than as the atlas's underlying implementation.",
    "valid_from": "",
    "valid_to": "",
    "external_ids": "{}",
    "geographies": [],
    "licence": "",
    "review_status": "curator_checked_public_sources",
    "reviewed_by": "Benjamin P Taylor",
    "reviewed_at": "2026-08-10",
    "x": 0.25,
    "y": 0.17,
    "canonical_id": "tool_nodica",
    "public_visibility": "public",
    "publication_level": "profile",
    "public_stub_text": "",
    "public_source_count": 1,
    "no_public_link_count": 0
  },
  "profile": {
    "node_id": "tool_nodica",
    "title": "Nodica",
    "profile_status": "curator_checked_public_sources",
    "canonical_definition": "An open-source RDF graph visualisation developed by Ivo Velitchkov, used here as a comparator for explicit semantics and graph navigation rather than as the atlas's underlying implementation.",
    "summary": "Nodica is an RDF graph visualisation project with image-filled nodes. It is used here as a live comparator for semantic graph presentation and as evidence that the contributor's question about explicit semantics was not merely rhetorical.",
    "why_it_matters": "The Necessary Tangle uses typed data but has not yet published a standard RDF export. Nodica makes the gap visible and supplies a practical comparison point without requiring the atlas to copy its interface or technology.",
    "key_distinctions": [
      "visualisation tool vs knowledge corpus",
      "RDF data vs this atlas's JSON model",
      "comparator vs dependency"
    ],
    "historical_lineage": [
      "RDF",
      "semantic web",
      "knowledge graph visualisation"
    ],
    "logical_antecedents": [
      "explicit semantics",
      "semantic network",
      "graph visualisation"
    ],
    "dependent_subsequents": [
      "RDF display",
      "image-rich graph browsing"
    ],
    "practice_connections": [
      "knowledge graph exploration",
      "semantic data presentation"
    ],
    "espoused_lineages": [],
    "observed_clusters": [],
    "common_misreadings": [
      "the atlas now runs on Nodica",
      "RDF removes editorial judgement",
      "the two projects have identical purposes"
    ],
    "open_checks": [
      "compare data-model features explicitly",
      "prototype a public RDF export from the atlas",
      "test interoperability rather than infer it"
    ],
    "source_ids": [
      "src_nodica_repo_2026"
    ],
    "evidence_ids": [],
    "last_researched": "2026-08-10",
    "review_status": "curator_checked_public_sources",
    "reviewed_by": "Benjamin P Taylor",
    "reviewed_at": "2026-08-10",
    "editorial_note": "Developed from cited public sources. The entry remains open to correction, rival accounts and stronger evidence."
  },
  "connections": [
    {
      "id": "e_12_nodica_ivo",
      "source": "tool_nodica",
      "target": "person_ivo_velitchkov",
      "relation_type": "developed_or_extended",
      "relation_family": "influence",
      "directed": "true",
      "dependency_kind": "",
      "confidence": "0.88",
      "claim_status": "accepted",
      "source_ids": [
        "src_nodica_repo_2026"
      ],
      "evidence_ids": [],
      "source_locator": "Release 0.12 public practitioner and publication sources",
      "valid_from": "",
      "valid_to": "",
      "scope_conditions": "The wording is limited to the named public sources. Bibliographic inclusion and organisational association do not establish wider intellectual influence.",
      "assertion_mode": "asserted",
      "inference_method": "curatorial synthesis of public primary, scholarly and professional-body sources",
      "claim_id": "",
      "reviewed_by": "Benjamin P Taylor",
      "reviewed_at": "2026-08-10",
      "notes": "The primary repository is owned and developed by Ivo Velitchkov.",
      "plain_phrase": "was developed or extended by",
      "public_review_label": "supported working statement"
    },
    {
      "id": "e_12_nodica_semantics",
      "source": "tool_nodica",
      "target": "concept_explicit_semantics",
      "relation_type": "operationalises",
      "relation_family": "practice",
      "directed": "true",
      "dependency_kind": "",
      "confidence": "0.88",
      "claim_status": "accepted",
      "source_ids": [
        "src_nodica_repo_2026"
      ],
      "evidence_ids": [],
      "source_locator": "Release 0.12 public practitioner and publication sources",
      "valid_from": "",
      "valid_to": "",
      "scope_conditions": "The wording is limited to the named public sources. Bibliographic inclusion and organisational association do not establish wider intellectual influence.",
      "assertion_mode": "asserted",
      "inference_method": "curatorial synthesis of public primary, scholarly and professional-body sources",
      "claim_id": "",
      "reviewed_by": "Benjamin P Taylor",
      "reviewed_at": "2026-08-10",
      "notes": "Nodica visualises RDF graph data and is used as a concrete comparator for semantic explicitness.",
      "plain_phrase": "puts into practical form",
      "public_review_label": "supported working statement"
    },
    {
      "id": "e16_relational_crosswalk_276",
      "source": "tool_nodica",
      "target": "concept_semantic_network",
      "relation_type": "uses",
      "relation_family": "practice",
      "directed": "true",
      "dependency_kind": "",
      "confidence": "0.72",
      "claim_status": "provisional",
      "source_ids": [
        "src_nodica_repo_2026",
        "src_principia_intro"
      ],
      "evidence_ids": [],
      "source_locator": "Interpretive comparison of the two maintained public descriptions and their cited source records",
      "valid_from": "",
      "valid_to": "",
      "scope_conditions": "This is a provisional semantic or practice crosswalk. It does not establish historical influence, equivalence, efficacy or universal applicability. Item-level source review and curator acceptance are still required.",
      "assertion_mode": "interpreted",
      "inference_method": "curator-requested relational crosswalk of maintained public descriptions",
      "claim_id": "",
      "reviewed_by": "",
      "reviewed_at": "",
      "notes": "",
      "plain_phrase": "represents explicitly typed knowledge as a",
      "public_review_label": "provisional relational crosswalk"
    },
    {
      "id": "e16_relational_crosswalk_277",
      "source": "tool_nodica",
      "target": "tool_systems_mapping",
      "relation_type": "complements",
      "relation_family": "conceptual",
      "directed": "true",
      "dependency_kind": "",
      "confidence": "0.72",
      "claim_status": "provisional",
      "source_ids": [
        "src_nodica_repo_2026",
        "src_go_science_toolkit_2023"
      ],
      "evidence_ids": [],
      "source_locator": "Interpretive comparison of the two maintained public descriptions and their cited source records",
      "valid_from": "",
      "valid_to": "",
      "scope_conditions": "This is a provisional semantic or practice crosswalk. It does not establish historical influence, equivalence, efficacy or universal applicability. Item-level source review and curator acceptance are still required.",
      "assertion_mode": "interpreted",
      "inference_method": "curator-requested relational crosswalk of maintained public descriptions",
      "claim_id": "",
      "reviewed_by": "",
      "reviewed_at": "",
      "notes": "",
      "plain_phrase": "offers a semantic-graph complement to",
      "public_review_label": "provisional relational crosswalk"
    }
  ],
  "claims": [],
  "sources": [
    {
      "id": "src_nodica_repo_2026",
      "title": "Nodica: RDF graph visualisation with image-filled nodes",
      "source_type": "primary_software_repository",
      "quality_tier": "A",
      "access": "public",
      "url": "https://github.com/kvistgaard/nodica",
      "date": "2026",
      "notes": "Primary source repository for Ivo Velitchkov's Nodica RDF graph visualisation. Used to establish the project's stated purpose, implementation and licence, not to endorse every semantic choice.",
      "creators": [
        "Ivo Velitchkov"
      ],
      "doi": "",
      "isbn": "",
      "publisher": "GitHub",
      "licence": "MIT",
      "archived_url": "",
      "content_hash": "",
      "review_status": "checked",
      "last_checked": "2026-08-10",
      "public_link_status": "public_link"
    },
    {
      "id": "src_principia_intro",
      "title": "Introduction to Principia Cybernetica",
      "source_type": "primary_project_page",
      "quality_tier": "A",
      "access": "public",
      "url": "https://pespmc1.vub.ac.be/INTRO.html",
      "date": "",
      "notes": "Primary project-authored orientation page.",
      "creators": [],
      "doi": "",
      "isbn": "",
      "publisher": "Principia Cybernetica Project",
      "licence": "source_terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "checked",
      "last_checked": "2026-08-10",
      "public_link_status": "public_link"
    },
    {
      "id": "src_go_science_toolkit_2023",
      "title": "An introductory systems thinking toolkit for civil servants",
      "source_type": "government_toolkit",
      "quality_tier": "A",
      "access": "public",
      "url": "https://www.gov.uk/government/publications/systems-thinking-for-civil-servants/toolkit",
      "date": "2023-01-12",
      "notes": "Official UK government introductory toolkit containing eleven named systems tools; explicitly non-comprehensive.",
      "creators": [],
      "doi": "",
      "isbn": "",
      "publisher": "",
      "licence": "",
      "archived_url": "",
      "content_hash": "",
      "review_status": "checked",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    }
  ],
  "evidence_locators": [],
  "reuse_note": "Preserve source attribution, scope, and review status. Source documents and evidence excerpts are excluded."
}