Are URLs case-sensitive ?

... as far as Google concerned ?

[bcc1234]

Hi,
Does google treat www.MyDomain.com and www.mydomain.com as one URL ?
What about mydomain.com/page.html and mydomain.com/Page.html ?
- For PageRank (links from other pages to .../Page.html and .../page.html) ?
- What about being penalized for duplicate content on Page.html and page.html ?

Any fact, guesses, ideas ?

[mbauser2]

Domain names are declared by spec to be case-insensitive. (RFC 1035 [ietf.org], section 2.3.3)

The rest of a URL is case sensitive, according to the BNF diagram in section 1.6 of RFC 2396 [ietf.org], with section 6 exempting the scheme and hostname from the BNF syntax rules.

Google will follow the specs on this one. (They usually follow the spec on things.) Capitalization of the domain name doesn't matter, but /page.html and /Page.html are 2 different URLs.

[bcc1234]

Capitalization of the domain name doesn't matter, but /page.html and /Page.html are 2 different URLs.

So I can safely ask people to link to my site giving them www.MySite.com and knowing that even though some of them put www.mysite.com - the PageRank will be combined ?

[Brett_Tabke]

Yes, as MB said, the local part (path, filename) are of course case sensitive like most directory and filenames are.

[bcc1234]

Ok thanks.