gnus: Score File Syntax
11.7.3 Score File Syntax
------------------------
Score files are meant to be easily parsable, but yet extremely
malleable. It was decided that something that had the same read syntax
as an Emacs Lisp list would fit that spec.
Here’s a typical score file:
(("summary"
("Windows 95" -10000 nil s)
("Gnus"))
("from"
("Lars" -1000))
(mark -100))
BNF definition of a score file:
score-file = "" / "(" *element ")"
element = rule / atom
rule = string-rule / number-rule / date-rule
string-rule = "(" quote string-header quote space *string-match ")"
number-rule = "(" quote number-header quote space *number-match ")"
date-rule = "(" quote date-header quote space *date-match ")"
quote = <ascii 34>
string-header = "subject" / "from" / "references" / "message-id" /
"xref" / "body" / "head" / "all" / "followup"
number-header = "lines" / "chars"
date-header = "date"
string-match = "(" quote <string> quote [ "" / [ space score [ "" /
space date [ "" / [ space string-match-t ] ] ] ] ] ")"
score = "nil" / <integer>
date = "nil" / <natural number>
string-match-t = "nil" / "s" / "substring" / "S" / "Substring" /
"r" / "regex" / "R" / "Regex" /
"e" / "exact" / "E" / "Exact" /
"f" / "fuzzy" / "F" / "Fuzzy"
number-match = "(" <integer> [ "" / [ space score [ "" /
space date [ "" / [ space number-match-t ] ] ] ] ] ")"
number-match-t = "nil" / "=" / "<" / ">" / ">=" / "<="
date-match = "(" quote <string> quote [ "" / [ space score [ "" /
space date [ "" / [ space date-match-t ] ] ] ] ")"
date-match-t = "nil" / "at" / "before" / "after"
atom = "(" [ required-atom / optional-atom ] ")"
required-atom = mark / expunge / mark-and-expunge / files /
exclude-files / read-only / touched
optional-atom = adapt / local / eval
mark = "mark" space nil-or-number
nil-or-number = "nil" / <integer>
expunge = "expunge" space nil-or-number
mark-and-expunge = "mark-and-expunge" space nil-or-number
files = "files" *[ space <string> ]
exclude-files = "exclude-files" *[ space <string> ]
read-only = "read-only" [ space "nil" / space "t" ]
adapt = "adapt" [ space "ignore" / space "t" / space adapt-rule ]
adapt-rule = "(" *[ <string> *[ "(" <string> <integer> ")" ] ")"
local = "local" *[ space "(" <string> space <form> ")" ]
eval = "eval" space <form>
space = *[ " " / <TAB> / <NEWLINE> ]
Any unrecognized elements in a score file should be ignored, but not
discarded.
As you can see, white space is needed, but the type and amount of
white space is irrelevant. This means that formatting of the score file
is left up to the programmer—if it’s simpler to just spew it all out on
one looong line, then that’s ok.
The meaning of the various atoms are explained elsewhere in this
manual (
Score File Format).
Info Catalog
gnus: Back End Interface
gnus: Gnus Reference Guide
gnus: Headers