NLP.Nerf.Schema

Observation schema blocks for Nerf.

Schema

type Ox a = Ox Word Text a

The Ox monad specialized to word token type and text observations.

type Schema a = Vector Word -> Int -> Ox a

A schema is a block of the Ox computation performed within the context of the sentence and the absolute sentence position.

void :: a -> Schema a

A dummy schema block.

sequenceS_ :: [Schema a] -> Schema ()

Sequence the list of schemas and discard individual values.

Using the schema

schematize :: Schema a -> [Word] -> Sent Ob

Use the schema to extract observations from the sentence.

Building schema

From config

data SchemaCfg

Configuration of the schema. All configuration elements specify the range over which a particular observation type should be taken on account. For example, the [-1, 0, 2] range means that observations of particular type will be extracted with respect to previous (k - 1), current (k) and after the next (k + 2) positions when identifying the observation set for position k in the input sentence.

Constructors

SchemaCfg

Fields

orthC :: [Int]

The orthS schema block

lemmaC :: [Int]

The lemmaS schema block

shapeC :: [Int]

The shapeS schema block

shapePairC :: [Int]

The shapePairS schema block

suffixC :: [Int]

The suffixS schema block

dictC :: Maybe (NeDict, [Int])

The searchS schema block

Instances

Binary SchemaCfg

defaultCfg

Arguments

:: FilePath

Path to NeDict in a binary form

-> IO SchemaCfg

Default configuration for Nerf observation schema.

fromCfg :: SchemaCfg -> Schema ()

Build the schema based on the configuration.

Schema blocks

type Block a = Vector Word -> [Int] -> Ox a

A block is a chunk of the Ox computation performed within the context of the sentence and the list of absolute sentence positions.

fromBlock :: Block a -> [Int] -> Schema a

Transform the block to the schema dependent on the list of relative sentence positions.

orthS :: Block ()

Orthographic observations determined with respect to the list of relative positions.

lemmaS :: Block ()

Lemma substitute determined with respect to the list of relative positions.

shapeS :: Block ()

Shape and packed shape determined with respect to the list of relative positions.

shapePairS :: Block ()

Shape pairs determined with respect to the list of relative positions.

suffixS :: Block ()

Several suffixes determined with respect to the list of relative positions.

searchS :: NeDict -> Block ()

Plain dictionary search determined with respect to the list of relative positions.