"Purple Dragon Book" meaning in English

{
  "etymology_text": "The textbook was originally published with a purple dragon on its cover art.",
  "forms": [
    {
      "form": "the Purple Dragon Book",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Purple Dragon Book"
      },
      "expansion": "the Purple Dragon Book",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Books",
          "orig": "en:Books",
          "parents": [
            "Literature",
            "Mass media",
            "Culture",
            "Entertainment",
            "Writing",
            "Media",
            "Society",
            "Human behaviour",
            "Language",
            "Communication",
            "All topics",
            "Human",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Computer science",
          "orig": "en:Computer science",
          "parents": [
            "Computing",
            "Sciences",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The second edition of Compilers: Principles, Techniques, and Tools (2006), a notable textbook about compiler construction."
      ],
      "id": "en-Purple_Dragon_Book-en-name-oUiClXh2",
      "links": [
        [
          "computer science",
          "computer science"
        ],
        [
          "textbook",
          "textbook"
        ],
        [
          "compiler",
          "compiler"
        ],
        [
          "construction",
          "construction"
        ]
      ],
      "raw_glosses": [
        "(computer science, slang) The second edition of Compilers: Principles, Techniques, and Tools (2006), a notable textbook about compiler construction."
      ],
      "related": [
        {
          "word": "Dragon Book"
        },
        {
          "word": "Green Dragon Book"
        },
        {
          "word": "Blue Dragon Book"
        },
        {
          "word": "Red Dragon Book"
        }
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ]
    }
  ],
  "word": "Purple Dragon Book"
}

{
  "etymology_text": "The textbook was originally published with a purple dragon on its cover art.",
  "forms": [
    {
      "form": "the Purple Dragon Book",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "def": "1",
        "head": "Purple Dragon Book"
      },
      "expansion": "the Purple Dragon Book",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "related": [
    {
      "word": "Dragon Book"
    },
    {
      "word": "Green Dragon Book"
    },
    {
      "word": "Blue Dragon Book"
    },
    {
      "word": "Red Dragon Book"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English proper nouns",
        "English slang",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Books",
        "en:Computer science"
      ],
      "glosses": [
        "The second edition of Compilers: Principles, Techniques, and Tools (2006), a notable textbook about compiler construction."
      ],
      "links": [
        [
          "computer science",
          "computer science"
        ],
        [
          "textbook",
          "textbook"
        ],
        [
          "compiler",
          "compiler"
        ],
        [
          "construction",
          "construction"
        ]
      ],
      "raw_glosses": [
        "(computer science, slang) The second edition of Compilers: Principles, Techniques, and Tools (2006), a notable textbook about compiler construction."
      ],
      "tags": [
        "slang"
      ],
      "topics": [
        "computer",
        "computing",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "science",
        "sciences"
      ]
    }
  ],
  "word": "Purple Dragon Book"
}