X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fwww%2Flambdadelta%2Fosn.html;h=47e9116c4f482e1fe884a812eb0d4277615242c9;hb=9a6cf8c3b53fe33515acd1aef8e7c7a10d71ae71;hp=41fe2ee6423cf0d29c9d092687c3b2e3532f2736;hpb=282936907bd9b37d9de37f14e0e497db16f5d8b0;p=helm.git
diff --git a/helm/www/lambdadelta/osn.html b/helm/www/lambdadelta/osn.html
index 41fe2ee64..47e9116c4 100644
--- a/helm/www/lambdadelta/osn.html
+++ b/helm/www/lambdadelta/osn.html
@@ -48,8 +48,9 @@
Apparently, these features fall outside the scope of OSN,
which targets the data structures of formal languages.
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Optionally qualified symbolic expressions
@@ -59,8 +60,9 @@
domain-specific OSN applications can work as expected even if
data from different domains is added to the text they process.
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The US-ASCII character set,
@@ -86,37 +88,43 @@
symbol = 1 * symbol-char ;
symbol-char = '+' | '-' | '.' | '0' | ... | '9' | 'A' | ... | 'Z' | '_' | '`' | 'a' | ... | 'z' ;
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This token contains free-form text with commonly accepted escape sequences:
string = '"' , * ( string-char | "'" | '\' escape ) , '"' ;
string-char = ( #0 | ... | #10FFFF ) - ( #0 | ... | #1F | "'" | '\' | '"' | #7F ) ;
escape = 1 * space | '"' | "'" | '(' | ')' | '0' | '\' | 'a' | 'b' | 'e' | 'f' | 'n' | 'r' | 't' | ( 'u' , 4 * 4 hex ) | 'v' | ( 'x' , 2 * 2 hex ) ;
space = #9 | ... | #D | #20 ;
hex = '0' | ... | '9' | 'A' | ... | 'F' | 'a' | ... | 'f' ;
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This token is a widely used alternative of the former token:
string-alt = "'" , * ( string-char | '"' | '\' escape ) , "'" ;
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This token separates the qualifiers of a symbolic expression:
sep = ':' ;
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This token starts a compound symbolic expression:
open = '(' | '<' | '[' | '{' ;
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This token ends a compound symbolic expression:
close = ')' | '>' | ']' | '}' ;
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This token is ignored and separates the other tokens:
@@ -133,13 +141,15 @@
text = * q-expr ;
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A qualified symbolic expression:
q-expr = * ( symbol , 1 * sep ) , expr ;
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An unqualified symbolic expression:
@@ -187,6 +197,6 @@
- Last update: Fri, 22 Jul 2016 19:42:53 +0200
+ Last update: Fri, 22 Jul 2016 19:58:53 +0200