I wanted to find out how elasticsearch tokens the languages other than english and i tried out the analyze api provided by it. But I cannot understand the output at all. Take for example
GET myindex/_analyze?analyzer=hindi&text="में कहता हूँ और तुम सुनना "
Now in the above text there are 6 words in total so I expect at max 6 tokens( believing that text contains no stop words) but the output is somewhat like this
{
"tokens": [
{
"token": "2350",
"start_offset": 3,
"end_offset": 7,
"type": "<NUM>",
"position": 1
},
{
"token": "2375",
"start_offset": 10,
"end_offset": 14,
"type": "<NUM>",
"position": 2
},
{
"token": "2306",
"start_offset": 17,
"end_offset": 21,
"type": "<NUM>",
"position": 3
},
{
"token": "2325",
"start_offset": 25,
"end_offset": 29,
"type": "<NUM>",
"position": 4
},
{
"token": "2361",
"start_offset": 32,
"end_offset": 36,
"type": "<NUM>",
"position": 5
},
{
"token": "2340",
"start_offset": 39,
"end_offset": 43,
"type": "<NUM>",
"position": 6
},
{
"token": "2366",
"start_offset": 46,
"end_offset": 50,
"type": "<NUM>",
"position": 7
},
{
"token": "2361",
"start_offset": 54,
"end_offset": 58,
"type": "<NUM>",
"position": 8
},
{
"token": "2370",
"start_offset": 61,
"end_offset": 65,
"type": "<NUM>",
"position": 9
},
{
"token": "2305",
"start_offset": 68,
"end_offset": 72,
"type": "<NUM>",
"position": 10
},
{
"token": "2324",
"start_offset": 76,
"end_offset": 80,
"type": "<NUM>",
"position": 11
},
{
"token": "2352",
"start_offset": 83,
"end_offset": 87,
"type": "<NUM>",
"position": 12
},
{
"token": "2340",
"start_offset": 91,
"end_offset": 95,
"type": "<NUM>",
"position": 13
},
{
"token": "2369",
"start_offset": 98,
"end_offset": 102,
"type": "<NUM>",
"position": 14
},
{
"token": "2350",
"start_offset": 105,
"end_offset": 109,
"type": "<NUM>",
"position": 15
},
{
"token": "2360",
"start_offset": 113,
"end_offset": 117,
"type": "<NUM>",
"position": 16
},
{
"token": "2369",
"start_offset": 120,
"end_offset": 124,
"type": "<NUM>",
"position": 17
},
{
"token": "2344",
"start_offset": 127,
"end_offset": 131,
"type": "<NUM>",
"position": 18
},
{
"token": "2344",
"start_offset": 134,
"end_offset": 138,
"type": "<NUM>",
"position": 19
},
{
"token": "2366",
"start_offset": 141,
"end_offset": 145,
"type": "<NUM>",
"position": 20
}
]
}
That means instead of six elasticsearch has detected around 20 tokens and all of type NUM(I don't know what's that) I am really confused why this is happening. Can someone enlighten me what is happening. What am I doing doing wrong or where I lack in my understanding?
How are you calling the elasticsearch API - possibly the Hindi characters are getting messed up by your client?
It works okay for me (at least the Hindi chars are appearing in the result) on Linux with curl:
curl -XPOST 'http://localhost:9200/myindex/_analyze?analyzer=hindi&pretty' -d 'में कहता हूँ और तुम सुनना '
{
"tokens" : [ {
"token" : "कह",
"start_offset" : 4,
"end_offset" : 8,
"type" : "<ALPHANUM>",
"position" : 2
}, {
"token" : "हुं",
"start_offset" : 9,
"end_offset" : 12,
"type" : "<ALPHANUM>",
"position" : 3
}, {
"token" : "तुम",
"start_offset" : 16,
"end_offset" : 19,
"type" : "<ALPHANUM>",
"position" : 5
}, {
"token" : "सुन",
"start_offset" : 20,
"end_offset" : 25,
"type" : "<ALPHANUM>",
"position" : 6
} ]
}