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  "Title": "Genetic Operations for Grammar-Based Genetic Programming",
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  "Authors@R": "person(given = \"Andreas\",\nfamily = \"Geyer-Schulz\",\nrole = c(\"aut\", \"cre\"),\nemail = \"Andreas.Geyer-Schulz@kit.edu\",\ncomment = c(ORCID = \"0009-0000-5237-3579\"))",
  "Description": "An implementation of the representation-dependent gene\nlevel operations of grammar-based genetic programming with\ngenes which are derivation trees of a context-free grammar:\nInitialization of a gene with a complete random derivation\ntree, decoding of a derivation tree. Crossover is implemented\nby exchanging subtrees. Depth-bounds for the minimal and the\nmaximal depth of the roots of the subtrees exchanged by\ncrossover can be set. Mutation is implemented by replacing a\nsubtree by a random subtree. The depth of the random subtree\nand the insertion node are configurable. For details, see\nGeyer-Schulz (1997, ISBN:978-3-7908-0830-X).",
  "License": "MIT + file LICENSE",
  "URL": "https://github.com/ageyerschulz/xegaGpGene",
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  "Repository": "https://ageyerschulz.r-universe.dev",
  "Date/Publication": "2025-08-18 16:41:45 UTC",
  "RemoteUrl": "https://github.com/ageyerschulz/xegagpgene",
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  "NeedsCompilation": "no",
  "Packaged": {
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    "User": "root"
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  "Author": "Andreas Geyer-Schulz [aut, cre] (ORCID:\n<https://orcid.org/0009-0000-5237-3579>)",
  "Maintainer": "Andreas Geyer-Schulz <Andreas.Geyer-Schulz@kit.edu>",
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  "_published": "2026-05-22T09:50:41.267Z",
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    "author": "andreas.geyer-schulz <andreas.geyer-schulz@kit.edu>",
    "committer": "andreas.geyer-schulz <andreas.geyer-schulz@kit.edu>",
    "message": "evalFail element in return of mutations/crossovers\n",
    "time": 1755535305
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    "name": "Andreas Geyer-Schulz",
    "email": "andreas.geyer-schulz@kit.edu",
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      "role": "Imports"
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      "role": "Imports"
    },
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      "role": "Suggests"
    }
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  "_selfowned": true,
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  "_updates": [
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    "extra/citation.html",
    "extra/citation.json",
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    "extra/NEWS.txt",
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      "date": "2025-04-17"
    },
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    "lFxegaGpGene",
    "xegaGpAllCross2Gene",
    "xegaGpAllCrossGene",
    "xegaGpCrossoverFactory",
    "xegaGpDecodeGene",
    "xegaGpFilterCross2Gene",
    "xegaGpFilterCrossGene",
    "xegaGpInitGene",
    "xegaGpInitGeneFactory",
    "xegaGpInitGeneGe",
    "xegaGpMutateAllGene",
    "xegaGpMutateFilterGene",
    "xegaGpMutationFactory"
  ],
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    "xegaDerivationTrees",
    "xegaSelectGene"
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  "_nocasepkg": "xegagpgene",
  "_universes": [
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