"topic map" meaning in English

{
  "forms": [
    {
      "form": "topic maps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "topic map (plural topic maps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Information science",
          "orig": "en:Information science",
          "parents": [
            "Applied sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A representation of knowledge consisting of a graph of topics (representing any concept, from people, countries, and organizations to software modules, individual files, and events), associations (which represent the relationships between them), and occurrences (which represent relationships between topics and information resources relevant to them)."
      ],
      "id": "en-topic_map-en-noun-bjZ3uI3I",
      "links": [
        [
          "topic",
          "topic"
        ],
        [
          "association",
          "association"
        ],
        [
          "occurrence",
          "occurrence"
        ]
      ],
      "wikipedia": [
        "topic map"
      ]
    }
  ],
  "word": "topic map"
}

{
  "forms": [
    {
      "form": "topic maps",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "topic map (plural topic maps)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "en:Information science"
      ],
      "glosses": [
        "A representation of knowledge consisting of a graph of topics (representing any concept, from people, countries, and organizations to software modules, individual files, and events), associations (which represent the relationships between them), and occurrences (which represent relationships between topics and information resources relevant to them)."
      ],
      "links": [
        [
          "topic",
          "topic"
        ],
        [
          "association",
          "association"
        ],
        [
          "occurrence",
          "occurrence"
        ]
      ],
      "wikipedia": [
        "topic map"
      ]
    }
  ],
  "word": "topic map"
}