"en base a" meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "it",
        "3": "in base a"
      },
      "expansion": "Italian in base a",
      "name": "bor"
    }
  ],
  "etymology_text": "Maybe from Italian in base a.",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "preposition"
      },
      "expansion": "en base a",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prep",
  "senses": [
    {
      "alt_of": [
        {
          "word": "con base en"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish prepositions",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "2015 October 11, “Coren hace rentables sus orígenes”, in El País",
          "text": "Los animales, en un 50% de raza duroc, un 25% landrace y otro 25% de raza large white, entran en el cebadero a los dos meses y medio y son cebados durante otros cinco meses en base a cereales y un componente de 25 kilos de castaña por unidad, lo que supone la compra de un millón de kilos de este fruto que se recoge en temporada, se cuece y congela para su disponibilidad durante todo el año.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of con base en"
      ],
      "id": "en-en_base_a-es-prep-tBcWZgHo",
      "links": [
        [
          "con base en",
          "con base en#Spanish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "en base a"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "it",
        "3": "in base a"
      },
      "expansion": "Italian in base a",
      "name": "bor"
    }
  ],
  "etymology_text": "Maybe from Italian in base a.",
  "head_templates": [
    {
      "args": {
        "1": "es",
        "2": "preposition"
      },
      "expansion": "en base a",
      "name": "head"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "prep",
  "senses": [
    {
      "alt_of": [
        {
          "word": "con base en"
        }
      ],
      "categories": [
        "Requests for translations of Spanish quotations",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish multiword terms",
        "Spanish prepositions",
        "Spanish terms borrowed from Italian",
        "Spanish terms derived from Italian",
        "Spanish terms with quotations"
      ],
      "examples": [
        {
          "english": "(please add an English translation of this quotation)",
          "ref": "2015 October 11, “Coren hace rentables sus orígenes”, in El País",
          "text": "Los animales, en un 50% de raza duroc, un 25% landrace y otro 25% de raza large white, entran en el cebadero a los dos meses y medio y son cebados durante otros cinco meses en base a cereales y un componente de 25 kilos de castaña por unidad, lo que supone la compra de un millón de kilos de este fruto que se recoge en temporada, se cuece y congela para su disponibilidad durante todo el año.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "Alternative form of con base en"
      ],
      "links": [
        [
          "con base en",
          "con base en#Spanish"
        ]
      ],
      "tags": [
        "alt-of",
        "alternative"
      ]
    }
  ],
  "word": "en base a"
}