What characters are not recommended (or illegal) in a static URL?

[sun818]

As much as possible, I construct my static URLs using alphanumeric characters, and substituting spaces with dashes. I am at a point where it may be easier to use the following characters:

' (single quote)
: (colon)

Are these characters web safe?
Are there other web safe characters?

[Duckula]

Reserved & unsafe characters: URL encoding [webclass.csuchico.edu]

[jdMorgan]

And RFC 2396, section 2.2 through 2.4.3: [faqs.org...]

Jim

[sun818]

Thank you both! :) That was a real education. Single quote is okay, but not colon.