FT.CREATE:
    summary: Set the string value of a key
    complexity: O(1)
    arguments:
        - 
            comment: the index name
            name: index_name
            type: key
        - 
            name:
                - field
                - score | NUMERIC
            type:
                - string
                - double | enum
                - enum:
                    - NUMERIC
            comment: 
                pairs of field name and relative weight in scoring. 
                The weight is a double, but does not need to be normalized.
       
    since: 0.1
    returns:
        type: status
        value: OK on success, error otherwise

FT.ADD:
    complexity: O(1)
    arguments:
        - 
            comment: the index name
            name: index_name
            type: key
        - 
            name: docId
            type: string
        -
            name: score
            type: double
            comment: The document's score, between 0.0 and 1.0
        - 
            command: LANGUAGE
            name:
                - lang
            type:
                - string
            optional: true
        -
            name: nosave
            type: enum
            enum: [NOSAVE]
        -
        
 index docId score [LANGUAGE lang] [NOSAVE] FIELDS <field> <text> ....


