fex_rule Class Reference

Class fex_rule stores a feature extraction rule. More...

#include <fex_rule.h>

List of all members.

Public Member Functions
	fex_rule (const std::wstring &, const std::wstring &, int, const std::list< fex_condition > &)
	Constructor, given pattern, rang, and condition:(focus, function, param)
	fex_rule (const fex_rule &)
	Copy constructor.
fex_rule &	operator= (const fex_rule &)
	assignment
void	clear_features ()
	clear existing features set (starting a new sentence)
void	precompute (const sentence &, int)
	check whether a word matches the rule, precompute the feature, and store it.
void	extract (const sentence &, int, int, std::list< std::wstring > &) const
	Use precomputed features to extract actual features for word "i" as seen form word "anch".
int	get_left () const
	get left limit of range
int	get_right () const
	get right limit of range
void	trace (int) const
	print rule to stderr in the given tracelevel (debug purposes only)
Static Public Member Functions
static bool	check_conds (std::list< fex_condition > &, int, const word &)
	check a list of conditions with and/or on a word.
Static Public Attributes
static std::map< std::wstring, const feature_function * >	feat_functs
	currently loaded specific feature extraction functions
static std::map< std::wstring, const feature_function * >	nerc_features
	available NERC-specific feature extraction functions.
Private Member Functions
void	pattern_instance (const sentence &, int, std::list< std::wstring > &) const
	replace marked chunks in a rule pattern (e.g.
void	get_replacements (const std::wstring &, const word &, std::list< std::wstring > &) const
Private Attributes
std::wstring	pattern
	rule pattern to build feature
int	left
	range around target where rule should be applied
int	right
std::list< fex_condition >	conds
	additional condition to be met by the target.
int	operation
	whether conditions should be joined with AND or OR
std::map< int, std::list < std::wstring > >	features
	store feature generated by this rule for each word
Static Private Attributes
static boost::u32regex	rulepat
	auxiliar regexs to parse rules
static boost::u32regex	rulepat_anch
static boost::u32regex	subexpr
static boost::u32regex	featfun

---

Detailed Description

Class fex_rule stores a feature extraction rule.

---

Constructor & Destructor Documentation

fex_rule::fex_rule	(	const std::wstring &	,
		const std::wstring &	,
		int	,
		const std::list< fex_condition > &
	)

Constructor, given pattern, rang, and condition:(focus, function, param)

fex_rule::fex_rule

(

const fex_rule &

)

Copy constructor.

---

Member Function Documentation

static bool fex_rule::check_conds	(	std::list< fex_condition > &	,
		int	,
		const word &
	)		[static]

check a list of conditions with and/or on a word.

void fex_rule::clear_features

(

)

clear existing features set (starting a new sentence)

void fex_rule::extract	(	const sentence &	,
		int	,
		int	,
		std::list< std::wstring > &
	)		const

Use precomputed features to extract actual features for word "i" as seen form word "anch".

int fex_rule::get_left

(

)

const

get left limit of range

void fex_rule::get_replacements	(	const std::wstring &	,
		const word &	,
		std::list< std::wstring > &
	)		const [private]

int fex_rule::get_right

(

)

const

get right limit of range

fex_rule& fex_rule::operator=

(

const fex_rule &

)

assignment

void fex_rule::pattern_instance	(	const sentence &	,
		int	,
		std::list< std::wstring > &
	)		const [private]

replace marked chunks in a rule pattern (e.g.

: $t(0), $l(-1),...) with appropriate instance for given word

void fex_rule::precompute	(	const sentence &	,
		int
	)

check whether a word matches the rule, precompute the feature, and store it.

void fex_rule::trace

(

int

)

const

print rule to stderr in the given tracelevel (debug purposes only)

---

Member Data Documentation

std::list<fex_condition> fex_rule::conds [private]

additional condition to be met by the target.

std::map<std::wstring,const feature_function *> fex_rule::feat_functs [static]

currently loaded specific feature extraction functions

boost::u32regex fex_rule::featfun [static, private]

std::map<int,std::list<std::wstring> > fex_rule::features [private]

store feature generated by this rule for each word

int fex_rule::left [private]

range around target where rule should be applied

std::map<std::wstring,const feature_function *> fex_rule::nerc_features [static]

available NERC-specific feature extraction functions.

int fex_rule::operation [private]

whether conditions should be joined with AND or OR

std::wstring fex_rule::pattern [private]

rule pattern to build feature

int fex_rule::right [private]

boost::u32regex fex_rule::rulepat [static, private]

auxiliar regexs to parse rules

boost::u32regex fex_rule::rulepat_anch [static, private]

boost::u32regex fex_rule::subexpr [static, private]

---

The documentation for this class was generated from the following file:

• fex_rule.h