Get a list of Identifier objects. Idenfifiers have a 1..*:1 mapping with Observations.

### Available end points:

- `/identifier/` - Will list all Results in the database
- `/identifier.json` - Will return all Results in json format
- `/identifier/<object_id>/` - Returns Results object with that id

### Available Methods:

- `GET`
- `HEAD`

### Available filters:

- `url`
- `idenfifierType`

### How to use filters:



`/identifier/?url=mst`

`/identifier.json?identifierType=ceda_abbreviation`

GET /api/v2/identifiers/?format=api&offset=11000
HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "count": 11746,
    "next": "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/?format=api&limit=100&offset=11100",
    "previous": "https://api.catalogue.ceda.ac.uk/api/v2/identifiers/?format=api&limit=100&offset=10900",
    "results": [
        {
            "ob_id": 12933,
            "relatedTo": {
                "ob_id": 2941,
                "uuid": "0250f4670abb4b39838482d44a5c5a10",
                "short_code": "instr"
            },
            "url": "uom-grimm",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12934,
            "relatedTo": {
                "ob_id": 879,
                "uuid": "84d60aea395b491f8313d6c75b580f93",
                "short_code": "instr"
            },
            "url": "ncas-aws-8",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12935,
            "relatedTo": {
                "ob_id": 4642,
                "uuid": "bf38bcb7cfac483bb2374b48b3809c57",
                "short_code": "instr"
            },
            "url": "ncas-scanning-radiometer-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12936,
            "relatedTo": {
                "ob_id": 795,
                "uuid": "e296a7dd92b047ba909ad7b9c742cced",
                "short_code": "instr"
            },
            "url": "ncas-42i-nox-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12937,
            "relatedTo": {
                "ob_id": 905,
                "uuid": "bfec242b35524bbe9dff61765e755271",
                "short_code": "instr"
            },
            "url": "ncas-noxy-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12938,
            "relatedTo": {
                "ob_id": 13070,
                "uuid": "951bb4d012d4490682b03dcd9864b1b7",
                "short_code": "instr"
            },
            "url": "ncas-2b-1chan-o3-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12939,
            "relatedTo": {
                "ob_id": 13071,
                "uuid": "76684ba152334ebcb72c44accff62b04",
                "short_code": "instr"
            },
            "url": "ncas-2b-2chan-o3-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12940,
            "relatedTo": {
                "ob_id": 799,
                "uuid": "cb9dcae55bee4f4dbc79374f6199b9d4",
                "short_code": "instr"
            },
            "url": "ncas-49c-o3-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12941,
            "relatedTo": {
                "ob_id": 13069,
                "uuid": "3f21274cd3ba40d391b154f87bfc9f25",
                "short_code": "instr"
            },
            "url": "ncas-49i-o3-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12942,
            "relatedTo": {
                "ob_id": 326,
                "uuid": "c39cb6ce89ea4b4a9c3d3d9ae602f983",
                "short_code": "instr"
            },
            "url": "ncas-ptrms-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12943,
            "relatedTo": {
                "ob_id": 39476,
                "uuid": "1a15df1693c846d2a74d180e030197c5",
                "short_code": "instr"
            },
            "url": "leeds-sodar-unit1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12992,
            "relatedTo": {
                "ob_id": 41840,
                "uuid": "c2c47fdb9a4443aa86713097f72eb030",
                "short_code": "instr"
            },
            "url": "ncas-sonic-3",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12993,
            "relatedTo": {
                "ob_id": 41841,
                "uuid": "179506fcdc444d4582ae3ffa7492bdca",
                "short_code": "instr"
            },
            "url": "ncas-sonic-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12994,
            "relatedTo": {
                "ob_id": 41842,
                "uuid": "8cd558334ab54d29980e489625f1d75b",
                "short_code": "instr"
            },
            "url": "ncas-sonic-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12995,
            "relatedTo": {
                "ob_id": 41843,
                "uuid": "f37277b7439f414b99aa5a5851de7728",
                "short_code": "instr"
            },
            "url": "ncas-sonic-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12996,
            "relatedTo": {
                "ob_id": 41844,
                "uuid": "553e49afd47c449295186ea0600d5afd",
                "short_code": "instr"
            },
            "url": "ncas-anemometer-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12997,
            "relatedTo": {
                "ob_id": 41845,
                "uuid": "12e15f6fc1b44cbda3d44f1c20271386",
                "short_code": "instr"
            },
            "url": "ncas-anemometer-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12998,
            "relatedTo": {
                "ob_id": 41846,
                "uuid": "1c4efcbf5b414e3a9768bbc6bed83063",
                "short_code": "instr"
            },
            "url": "ncas-aps-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 12999,
            "relatedTo": {
                "ob_id": 41847,
                "uuid": "e8568ffba5ec41e6bd40a0288cba87a6",
                "short_code": "instr"
            },
            "url": "ncas-aps-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13000,
            "relatedTo": {
                "ob_id": 41848,
                "uuid": "b04aab85880a4aad98a8656eabc9aeca",
                "short_code": "instr"
            },
            "url": "ncas-cam-7",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13001,
            "relatedTo": {
                "ob_id": 41849,
                "uuid": "10c115161d4d4e08b8e03eb2e83b6369",
                "short_code": "instr"
            },
            "url": "ncas-cam-3",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13002,
            "relatedTo": {
                "ob_id": 41850,
                "uuid": "19f5fee5819749b08547938cc3b9ac68",
                "short_code": "instr"
            },
            "url": "ncas-cam-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13003,
            "relatedTo": {
                "ob_id": 41851,
                "uuid": "cb8522634bfd48889f31f1347b68626f",
                "short_code": "instr"
            },
            "url": "ncas-cam-8",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13004,
            "relatedTo": {
                "ob_id": 41852,
                "uuid": "b8ae202093f2484b981ffcda97b06c89",
                "short_code": "instr"
            },
            "url": "ncas-cam-9",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13005,
            "relatedTo": {
                "ob_id": 41853,
                "uuid": "9d8856a15b1642268e205be1bef641be",
                "short_code": "instr"
            },
            "url": "ncas-cam-10",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13006,
            "relatedTo": {
                "ob_id": 41854,
                "uuid": "cd55321db6c04c01bc89f339298af16f",
                "short_code": "instr"
            },
            "url": "ncas-cam-5",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13007,
            "relatedTo": {
                "ob_id": 41855,
                "uuid": "bd66c46dab7e4ac98e32253eaad4fa7a",
                "short_code": "instr"
            },
            "url": "ncas-cam-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13008,
            "relatedTo": {
                "ob_id": 41856,
                "uuid": "7ed4493f851f4423ab704f9b0cef4145",
                "short_code": "instr"
            },
            "url": "ncas-cam-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13009,
            "relatedTo": {
                "ob_id": 41857,
                "uuid": "0635a65a359c412d9ac91033a5983fa9",
                "short_code": "instr"
            },
            "url": "ncas-cam-6",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13010,
            "relatedTo": {
                "ob_id": 41858,
                "uuid": "d9f46a619d364d79bd3a1814c7514351",
                "short_code": "instr"
            },
            "url": "ncas-ceilometer-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13011,
            "relatedTo": {
                "ob_id": 41859,
                "uuid": "1ea57d9518ac4c2c93d3679e3f078d3d",
                "short_code": "instr"
            },
            "url": "ncas-ceilometer-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13012,
            "relatedTo": {
                "ob_id": 41860,
                "uuid": "04580d3cd4b8434791b46f588b2ee703",
                "short_code": "instr"
            },
            "url": "ncas-ceilometer-3",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13013,
            "relatedTo": {
                "ob_id": 41861,
                "uuid": "54ea675d4f39416598158937eee06d97",
                "short_code": "instr"
            },
            "url": "ncas-ceilometer-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13014,
            "relatedTo": {
                "ob_id": 41862,
                "uuid": "b97265f6b8914bf5866653e5823bc0bc",
                "short_code": "instr"
            },
            "url": "ncas-ceilometer-6",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13015,
            "relatedTo": {
                "ob_id": 41863,
                "uuid": "8689c1f5e638428db9938ab76de5d63d",
                "short_code": "instr"
            },
            "url": "ncas-ugga-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13016,
            "relatedTo": {
                "ob_id": 41864,
                "uuid": "372a4e4bf134422f9ff722e919985cee",
                "short_code": "instr"
            },
            "url": "ncas-aerolaser-co-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13017,
            "relatedTo": {
                "ob_id": 41865,
                "uuid": "bc80cd20e3f346f7aff5b48c74052116",
                "short_code": "instr"
            },
            "url": "ncas-aerolaser-co-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13018,
            "relatedTo": {
                "ob_id": 41866,
                "uuid": "cfe46231631d41438f957a7cddd25b7d",
                "short_code": "instr"
            },
            "url": "ncas-co-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13019,
            "relatedTo": {
                "ob_id": 41867,
                "uuid": "fe527812571043eba21c5ed0be9ec527",
                "short_code": "instr"
            },
            "url": "ncas-co-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13020,
            "relatedTo": {
                "ob_id": 41868,
                "uuid": "40aa1ee9ce1540d09d134f8e430ae454",
                "short_code": "instr"
            },
            "url": "ncas-co-picarro-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13021,
            "relatedTo": {
                "ob_id": 41869,
                "uuid": "7b2d137c4b1945f5a955478bdea2e102",
                "short_code": "instr"
            },
            "url": "ncas-rga3-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13022,
            "relatedTo": {
                "ob_id": 41870,
                "uuid": "a153d3ee320f4b3f814031e8882e49f6",
                "short_code": "instr"
            },
            "url": "ncas-co2-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13023,
            "relatedTo": {
                "ob_id": 41871,
                "uuid": "152b067b4172413583b98089d21e55a2",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3010-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13024,
            "relatedTo": {
                "ob_id": 41872,
                "uuid": "0f52b23ce6f042a185830033ce438e90",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3010-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13025,
            "relatedTo": {
                "ob_id": 41873,
                "uuid": "6c60b53ac28f47ffb580b8e26992363c",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3750-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13026,
            "relatedTo": {
                "ob_id": 41874,
                "uuid": "c8a1cf0574c049bb89ecfdbb1d4c4981",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3750-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13027,
            "relatedTo": {
                "ob_id": 41875,
                "uuid": "7ca225acc31b47349b4beb6312a2648b",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3762-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13028,
            "relatedTo": {
                "ob_id": 41876,
                "uuid": "08ee8943c8534a27bc295f13d9d44f0f",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3762-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13029,
            "relatedTo": {
                "ob_id": 41877,
                "uuid": "26ddb1624dc8409c8b09ba65f685959a",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3762-3",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13030,
            "relatedTo": {
                "ob_id": 41878,
                "uuid": "f0ac258998e44156a1d868a2a0b8550c",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3762-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13031,
            "relatedTo": {
                "ob_id": 41879,
                "uuid": "fa5f06f52ae74737a9eaeeee0898d27a",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3776-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13032,
            "relatedTo": {
                "ob_id": 41880,
                "uuid": "3943ea1c8f654a7f99ac32972798c257",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3776-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13033,
            "relatedTo": {
                "ob_id": 41881,
                "uuid": "31af4c8c422b40dc9018e57ee57dc7f2",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3776-3",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13034,
            "relatedTo": {
                "ob_id": 41882,
                "uuid": "d9216bb5b63143f1903c3ae1eab60e54",
                "short_code": "instr"
            },
            "url": "ncas-cpc-3776-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13035,
            "relatedTo": {
                "ob_id": 41883,
                "uuid": "2a626260f729450782e5d2260c520161",
                "short_code": "instr"
            },
            "url": "ncas-dc-gc-fid-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13036,
            "relatedTo": {
                "ob_id": 41884,
                "uuid": "dd232a5970804f87a543f841f0235258",
                "short_code": "instr"
            },
            "url": "ncas-dc-gc-fid-4",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13037,
            "relatedTo": {
                "ob_id": 41885,
                "uuid": "9dd294783884474292be17d3a1fa070c",
                "short_code": "instr"
            },
            "url": "ncas-dc-gc-fid-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13038,
            "relatedTo": {
                "ob_id": 41886,
                "uuid": "ce8e0334fede4bbab4b5f596c389bf98",
                "short_code": "instr"
            },
            "url": "ncas-energy-balance-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13039,
            "relatedTo": {
                "ob_id": 41887,
                "uuid": "aee190adde21422f81181a8d7f26c0fe",
                "short_code": "instr"
            },
            "url": "ncas-energy-balance-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13040,
            "relatedTo": {
                "ob_id": 41888,
                "uuid": "7e5b482c85c848faa46d1bfc64ca5e21",
                "short_code": "instr"
            },
            "url": "ncas-flux-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13041,
            "relatedTo": {
                "ob_id": 41889,
                "uuid": "4f1be63da6d8404d8ab3e1d1da34a2c2",
                "short_code": "instr"
            },
            "url": "ncas-flux-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13042,
            "relatedTo": {
                "ob_id": 41890,
                "uuid": "aedad9e47ad94a8d82a4841ce1fc68d4",
                "short_code": "instr"
            },
            "url": "ncas-gc-ms-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13043,
            "relatedTo": {
                "ob_id": 41891,
                "uuid": "e7c43c64da584f2f88d869e1e8fb34bd",
                "short_code": "instr"
            },
            "url": "ncas-gc-ms-tof-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13044,
            "relatedTo": {
                "ob_id": 41892,
                "uuid": "acb65325e8a14a3186f394f45e2e0cd3",
                "short_code": "instr"
            },
            "url": "ncas-opc-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13045,
            "relatedTo": {
                "ob_id": 41893,
                "uuid": "d6c042bfe80646a78775ed95a0e3a733",
                "short_code": "instr"
            },
            "url": "ncas-scanning-radiometer-2",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
            "ob_id": 13046,
            "relatedTo": {
                "ob_id": 41894,
                "uuid": "9653d5798d71445c9320f9b600a90cab",
                "short_code": "instr"
            },
            "url": "ncas-licor-1",
            "identifierType": "ceda_abbreviation",
            "shortUrl": ""
        },
        {
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}