- From: Marcin Hanclik <Marcin.Hanclik@access-company.com>
- Date: Mon, 1 Jun 2009 00:44:38 +0200
- To: "public-webapps@w3.org" <public-webapps@w3.org>
Error in ABNF: localized-folder vs. locale-folder Error with ABNF utf8-chars = safe-chars / U+0080 and beyond "and beyond" does not fit here Section 2. of RFC2279 shows that all UTF-8 characters above U+0080 are encoded with byte values over 0x80. So utf-8 production equals to cp437 production on the byte level within the context that is important for us. So both productions can be equalized and removed, since allowed-char may be used. I think the problem is similar to this one about encoding (I just had a brief look on it): http://lists.w3.org/Archives/Public/public-html/2009May/0643.html Error with ABNF cp437-chars = safe-chars / x80-FF should be according to RFC2234: cp437-chars = safe-chars / %x80-FF Due to many issues I would rewrite the whole ABNF as follows. ABNF issues, additionally to the above, are: 1. plural form used for just "one-of" value 2. the zip-rel-path may have problems with existence, since all productions are optional. The below format seems equal and is shorter 3. the production of file-name is wrongly specified, since there file-extension could appear up to 254 times in a file name 4. I am not sure whether the file extension could be more than 3 chars or not in the existing ABNF? If so, the actual file name shall match 2 rules simultaneously, e.g.: file-name1 = 1*allowed-char [ "." 1*allowed-char ] file-name2 = 1*254 ( allowed-char ) Matching of those 2 rules is not expressible in ABNF, so prose would be needed. New ABNF (problem of file extension length as above still remains): ************** A valid Zip relative path is one that case-insensitively matches the production of Zip-rel-path in the following [ABNF] that operates on bytes, not on characters, i.e. after any encoding (CP437 or UTF-8) has been applied: zip-rel-path = [ locale-folder ] [ *folder-name ] [ file-name ] locale-folder = "locales" "/" Language-Tag "/" folder-name = file-name "/" file-name = base-name [ file-extension ] file-extension = "." 1*3 ( allowed-char ) base-name = 1*250( allowed-char ) allowed-char = safe-char / %x80-FF safe-char = ALPHA / DIGIT / SP / "$" / "%" / "'" / "-" / "_" / "@" / "~" / "(" / ")" / "&" / "+" / "," / "." / "=" / "[" / "]" ************** Authors need to keep path lengths below 250 bytes. Unicode code points can require more than one byte to encode, which can result in a path whose length is less than 250 characters. should be Authors need to keep path lengths below 250 bytes. Unicode code points may require more than one byte to encode a character, which can result in a path whose length is less than 250 characters to be represented in more than 250 bytes. UTF8-chars should be utf8-chars or utf8-char or something new (after the ABNF is updated) . ________________________________________ Access Systems Germany GmbH Essener Strasse 5 | D-46047 Oberhausen HRB 13548 Amtsgericht Duisburg Geschaeftsfuehrer: Michel Piquemal, Tomonori Watanabe, Yusuke Kanda www.access-company.com CONFIDENTIALITY NOTICE This e-mail and any attachments hereto may contain information that is privileged or confidential, and is intended for use only by the individual or entity to which it is addressed. Any disclosure, copying or distribution of the information by anyone else is strictly prohibited. If you have received this document in error, please notify us promptly by responding to this e-mail. Thank you.
Received on Sunday, 31 May 2009 22:45:18 UTC