added some information on old-style config to ABNF (probably useful in

    getting us to a new config format)

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/expression.html b/doc/expression.html
index 05f2b789..3aecf298 100644
--- a/doc/expression.html
+++ b/doc/expression.html
@@ -9,7 +9,7 @@ far, they are supported for filtering messages.</p><p>C-like comments (/* some c
 <h2>Formal Definition</h2>
 
 <p>Below is the formal definition of expression format (in ABNF, RFC 2234):<br>
-</p><pre>; The stuff immediately below here is a quick shot at how the config<br>; file ABNF *at whole* may look like. That is not really related to<br>; expressions, but for the time being I put it here. It will later be<br>; moved to a more appropriate place. -- rgerhards, 2008-02-22<br>if_stmt  := "if" expr "then"<br><br>; and now the actual expression<br>expr     := e_and *("or" e_and)<br>e_and    := e_cmp *("and" e_cmp)<br>e_cmp    := val 0*1(cmp_op val)<br>val      := term *(("+" / "-") term)<br>term     := factor *(("*" / "/" / "%") factor)<br>factor   := ["not"] ["-"] terminal<br>terminal := var / constant / function / ( "(" expr ")" )<br>function := name "(" *("," expr) ")"<br>var      := "$" varname<br>varname  := msgvar / sysvar<br>msgvar   := name<br>sysvar   := "$" name<br>name     := alpha *(alnum)<br>constant := string / number<br>string   := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr  := "'" *char "'"    ; use your imagination for char ;)<br>tplstr   := '"' template '"' ; not initially implemented<br>number   := ["-"] 1*digit ; 0nn = octal, 0xnn = hex, nn = decimal<br>cmp_op   := "==" / "!=" / "&lt;&gt;" / "&lt;" / "&gt;" / "&lt;=" / "&gt;=" / "contains" / "startswith"<br>digit    := %x30-39<br>alpha    := "a" ... "z" # all letters<br>alnum    :* alpha / digit / "_"<br></pre>
+</p><pre>; The stuff immediately below here is a quick shot at how the config<br>; file ABNF *at whole* may look like. That is not really related to<br>; expressions, but for the time being I put it here. It will later be<br>; moved to a more appropriate place. -- rgerhards, 2008-02-22<br>?line?   := cfsysline / cfli<br>cfsysline:= BOL "$" *char EOL ; how to handle the first line? (no EOL in front!)<br>BOL      := ; Begin of Line - implicitely set on file beginning and after each EOL<br>EOL       := 0x0a ;LF<br>if_stmt  := "if" expr "then"<br>old_filter:= BOL facility "." severity<br>facility := "*" / "auth" / "authpriv" / "cron" / "daemon" / "kern" / "lpr" / <br>            "mail" / "mark" / "news" / "security" / "syslog" / "user" / "uucp" / <br>            "local0" .. "local7" / "mark"<br>	   ; The keyword security should not be used anymore<br>	   ; mark is just internal<br>severity := <br><br>; and now the actual expression<br>expr     := e_and *("or" e_and)<br>e_and    := e_cmp *("and" e_cmp)<br>e_cmp    := val 0*1(cmp_op val)<br>val      := term *(("+" / "-") term)<br>term     := factor *(("*" / "/" / "%") factor)<br>factor   := ["not"] ["-"] terminal<br>terminal := var / constant / function / ( "(" expr ")" )<br>function := name "(" *("," expr) ")"<br>var      := "$" varname<br>varname  := msgvar / sysvar<br>msgvar   := name<br>sysvar   := "$" name<br>name     := alpha *(alnum)<br>constant := string / number<br>string   := simpstr / tplstr ; tplstr will be implemented in next phase<br>simpstr  := "'" *char "'"    ; use your imagination for char ;)<br>tplstr   := '"' template '"' ; not initially implemented<br>number   := ["-"] 1*digit ; 0nn = octal, 0xnn = hex, nn = decimal<br>cmp_op   := "==" / "!=" / "&lt;&gt;" / "&lt;" / "&gt;" / "&lt;=" / "&gt;=" / "contains" / "startswith"<br>digit    := %x30-39<br>alpha    := "a" ... "z" # all letters<br>alnum    :* alpha / digit / "_"<br></pre>
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