CTcue Analyzer

Development

Required:

• Python 2.7
• Natural Language ToolKit (NLTK)
• Flask
• Tornado

To start backend run

• python /api.py

The server runs on http://127.0.0.1:5000 by default

Example on server (inside the directory):

screen python api.py --host 188.226.214.70 --port 5000

Stopping it:

ps -ef | grep python kill -9 PID (ex. 2219)

Install

Assuming you have pip.

• sudo pip install nltk
• sudo python -m nltk.downloader -d /usr/share/nltk_data all
• sudo pip install flask
• sudo pip install -U flask-cors
• sudo pip install tornado

Extraction

Supported tasks:

• Tokenize
• Split sentences
• Extract health scores

All tasks require data to be submitted using POST requests with content-type application/json.

Tokenize

data    = {"text" : "Example sentences, which can be tokenized. We can also split the sentences."}
headers = {'Content-Type': 'application/json'}
url     = "http://127.0.0.1:5000/api/simple/tokenize"

requests.post(url, data=json.dumps(data), headers=headers)

Result: A list of words.

{
  "result" : ["Example", "sentences", ",", "which", "can", "be", "tokenized", ".", "We", "can", "also", "split", "the", "sentences", "."]
}

Split sentences

data    = {"text" : "Example sentences, which can be tokenized. We can also split the sentences."}
headers = {'Content-Type': 'application/json'}
url     = "http://127.0.0.1:5000/api/simple/sentence_split"

requests.post(url, data=json.dumps(data), headers=headers)

Result: A list of sentences.

{
  "result": [
    "Example sentences, which can be tokenized.",
    "We can also split the sentences."
  ]
}

Extract health scores

data =
{
    "text": "Example sentences, which can be tokenized. We can also split the sentences. We can extract scores like an agatston score of 432.",
    "health_scores": {
        "agatston": {
            "synonyms": [
                "agatston",
                "agatston-score",
                "agatstonscore",
                "kalkscore",
                "calciumscore"
            ],
            "values": {
                "type": "int",
                "min": 0,
                "max": 9999,
                "format": "(\\-*\\d+)((,|\\.)\\d+)?",
                "group": 0,
                "position" : {
                    "before" : -10,
                    "after" : 10
                }
            }
        }
    }
}

headers = {'Content-Type': 'application/json'}
url     = "http://127.0.0.1:5000/api/extract/health_scores"

requests.post(url, data=json.dumps(data), headers=headers)

The variable health_scores is a json object that contains the scores that need to be extracted. These scores are identified by a name and contain a list of synonyms and a set of constraints that the scores should match. These constraints include the value type (int, float), the minimum and maximum value the score can have, the position the score can be found relative to the score's name, and a string indicating the format (as regex). Finally, group indicates the regex group that contains the actual value. The json object can contain an unlimited number of health scores. The value constraints are optional, without it the system makes a "best guess." For synonyms it is advised to also add the original name of the score to the list.

Result: The resulting json objects contains for each requested health score a list of identified scores with evidence of why this value was extracted.

{
    "result": {
        "agatston": [
            {
                "sentenceNr": 2,
                "start": 30,
                "term": "agatston",
                "values": [
                    432
                ]
            }
        ],
        "sentences": [
            "Example sentences, which can be tokenized.",
            "We can also split the sentences.",
            "We can extract scores like an <em class=\"highlight\">agatston</em> score of 432."
        ]
    },
    "status": 200
}