robots.txt expert question

Is it possible for robots.txt to disallow all but one page?

[DanielDiGriz]

In robots.txt I have:

User-agent: *
Disallow: /

What I want, instead, is to disallow all but one page, *without having to specifically disallow each page on the site* (pages are added constantly). Am I correct that robots.txt provides no way to do this, since the protocol is to disallow rather than allow?

[jatar_k]

There is no allow, an option might be to disallow everything but that one page by doing them all explicitly.

User-agent: *
Disallow: /index.html
Disallow: /pages/
Disallow: /img/
Disallow: /otherpage.html

then have the page you want to allow in the root and disallow everything but.

[jdMorgan]

DanielDiGriz,

Welcome to WebmasterWorld [webmasterworld.com]!

It can be helpful to split files which are allowed from those which are disallowed into different subdirectories. In this way, you can disallow a subdirectory path, and add content to it at will. Since the whole subdirectory is disallowed, you won't need to change robots.txt.

Jim

[DanielDiGriz]

Explicitly is not an option, but I like the subdirectory idea. Thank you for the responses. :)