FQL 语法参考 (ABNF)
上次修改时间： 2010年4月30日
适用范围： SharePoint Server 2010
FAST 查询语言 (FQL) 表达式的结构对应于以下规则，这些规则符合补充的巴科斯-诺尔范式 (ABNF) 语法。
为了增强可读性，这些规则假定 FQL 表达式中不存在额外的空格。然而，FQL 却允许括号、逗号、运算符、关键字和标记前后紧跟着空格。
尽管 ABNF 并不明确支持 US-ASCII 之外的任何编码方式，但是 quoted-string-value 和 unquoted-string-value 数据类型支持具有 UTF-8 编码的宽字符值。
fql-expression = (operator-expression / paren-expression / token)
operator-expression = [in-expression] (and / andnot / any / or / rank
/ xrank / near / onear / not / equals / filter / starts-with
/ ends-with / count)
paren-expression = [in-expression] "(" fql-expression ")"
token = [in-expression] (datetime-token / float-token / int-token
/ phrase-token / range-token / string-token)
; Operator expressions
and = "and" "(" multiple-fql-params ")"
andnot = "andnot" "(" multiple-fql-params ")"
any = "any" "(" multiple-fql-params ")"
or = "or" "(" multiple-fql-params ")"
rank = "rank" "(" rank-param *("," rank-param) ")"
rank-param = token / fql-expression
xrank = "xrank" "(" xrank-param *("," xrank-param) ")"
xrank-param = ("boost" "=" integer-value)
/ ("boostall" "=" yesno-value)
/ fql-expression
near = "near" "(" near-param *("," near-param) ")"
near-param = ("N" "=" token-distance) / fql-expression
onear = "onear" "(" onear-param *("," onear-param) ")"
onear-param = ("N" "=" token-distance) / fql-expression
not = "not" "(" fql-expression ")"
count = ("count" "(" token
1*("," (("from" "=" int-token) / ("to" "=" int-token))) ")")
equals = "equals" "("
[in-expression] (string-token / phrase-token) ")"
starts-with = "starts-with" "("
[in-expression] (string-token / phrase-token) ")"
ends-with = "ends-with" "("
[in-expression] (string-token / phrase-token) ")"
filter = "filter" "(" fql-expression ")"
; Token operator expressions
phrase-token = "phrase" "(" phrase-token-param
*("," phrase-token-param) ")"
phrase-token-param = ("weight" "=" unsigned-integer-value)
/ ("linguistics" "=" onoff-value)
/ ("wildcard" "=" onoff-value)
/ token
string-token = explicit-string-token / implicit-string-token
explicit-string-token = "string" "(" string-token-param
*("," string-token-param) ")"
string-token-param = ("mode" "=" mode-value)
/ ("N" "=" token-distance)
/ ("weight" "=" integer-value)
/ ("minexpansion" "=" integer-value)
/ ("maxexpansion" "=" integer-value)
/ ("linguistics" "=" onoff-value)
/ ("wildcard" "=" onoff-value)
/ token
implicit-string-token = string-value
float-token = explicit-float-token / implicit-float-token
explicit-float-token = "float" "(" (float-value
/ (DQUOTE float-value DQUOTE)) ")"
implicit-float-token = *DIGIT "." 1*DIGIT
int-token = explicit-int-token / implicit-int-token
explicit-int-token = "int" "(" (integer-value
/ (DQUOTE integer-value DQUOTE)
/ (DQUOTE integer-value *(SP integer-value) DQUOTE ","
numeric-or-mode)
/ (numeric-or-mode "," DQUOTE 1*integer-value *(SP integer-value)
DQUOTE))
")"
implicit-int-token = integer-value
datetime-token = explicit-datetime-token / implicit-datetime-token
explicit-datetime-token = "datetime" "(" (datetime-value
/ (DQUOTE datetime-value DQUOTE)) ")"
implicit-datetime-token = datetime-value
range-token = "range" "(" range-token-param *("," range-token-param)
")"
range-token-param = ("from" "=" from-condition)
/ ("to" "=" to-condition)
/ range-limit
range-limit = datetime-token / float-token / int-token
/ "min" / "max"
from-condition = unquoted-from-condition
/ (DQUOTE unquoted-from-condition DQUOTE)
unquoted-from-condition = "GE" / "GT"
to-condition = unquoted-to-condition
/ (DQUOTE unquoted-to-condition DQUOTE)
unquoted-to-condition = "LE" / "LT"
; Data types
string-value = quoted-string-value / unquoted-string-value
; <quoted-string-value> can contain any characters
; (including wide characters) that are not control
; characters, except for double quotation marks.
quoted-string-value = DQUOTE 1*(quoted-escaped-character
/ %x20-21 / %x23-ffffffff) DQUOTE
quoted-escaped-character =
quoted-escaped-backslash
/ quoted-escaped-newline
/ quoted-escaped-carriage-return
/ quoted-escaped-tab
/ quoted-escaped-backspace
/ quoted-escaped-form-feed
/ quoted-escaped-double-quote
/ quoted-escaped-single-quote
quoted-escaped-backslash = "\\"
quoted-escaped-newline = "\n"
quoted-escaped-carriage-return = "\r"
quoted-escaped-tab = "\t"
quoted-escaped-backspace = "\b"
quoted-escaped-form-feed = "\f"
quoted-escaped-double-quote = "\" DQUOTE
quoted-escaped-single-quote = "'"
; <unquoted-string-value> can contain any characters (including wide
; characters) that are not control characters, except for spaces,
; commas, double quotation marks, parentheses,colons, and equals
; signs.
unquoted-string-value =
1*(%x21 / %x23-27 / %x2a-2b / %x2d-39 / %x3b-3c / %x3e-ffffffff)
integer-value = ["-" / "+"] 1*DIGIT
unsigned-integer-value = 1*DIGIT
float-value = ["-" / "+"] (*DIGIT "." 1*DIGIT) / 1*DIGIT
datetime-value = year "-" month "-" day
["T" hour ":" minute ":" second ["Z"]]
year = 4*DIGIT ; four-digit or longer year (0000-infinity)
month = ("0" DIGIT) ; two-digit month (00-09)
/ ("1" %x30-32) ; two-digit month (10-12)
day = (%x30-32 DIGIT) ; two-digit day (00-29)
/ ("3" %x30-31) ; two-digit day (30-31)
hour = (%x30-31 DIGIT) ; two-digit hour (00-19)
/ ("2" %x30-33) ; two-digit hour (20-23)
minute = (%x30-35 DIGIT) ; two-digit minute (00-59)
second = (%x30-35 DIGIT) ; two-digit second (00-59)
yesno-value = quoted-yesno-value / unquoted-yesno-value
quoted-yesno-value = DQUOTE unquoted-yesno-value DQUOTE
unquoted-yesno-value = "YES" / "NO"
onoff-value = quoted-onoff-value / unquoted-onoff-value
quoted-onoff-value = DQUOTE unquoted-onoff-value DQUOTE
unquoted-onoff-value = "ON" / "OFF"
; <mode-value> must be inside double quotation marks.
mode-value = DQUOTE ("PHRASE" / "AND" / "OR" / "ANY" / "NEAR"
/ "ONEAR" / "SIMPLEALL" / "SIMPLEANY") DQUOTE
; General syntax elements
in-expression = ((internal-property-name / property-name) ":")
/ (DQUOTE (internal-property-name / property-name) DQUOTE ":")
numeric-or-mode = "mode" "=" DQUOTE "OR" DQUOTE
token-distance = unsigned-integer-value
internal-property-name = property-name "." property-name
property-name = 1*(ALPHA / DIGIT)
multiple-fql-params = fql-expression 1*("," fql-expression)