I've created a robots.txt file for a new Magento install and used an existing site-map that was on the Magento help forums but the trouble is I can't decipher something. It seems that I am allowing and disallowing access to the same expression for pagination. My robots.txt file (and a lot of other Magento site-maps it seems) includes both:
Allow: /*?p=
and
Disallow: /?p=&
I've searched for help on RegEx and I can't see what "&" does but it seems to me that I'm allowing crawler access to all pagination URLs, but then possibly disallowing access to all pagination URLs that include anything other than just the page number?
I've looked at several resources and there is practically no reference to what "&" does...
Can anyone shed any light on this, to ensure I am allowing suitable access to a shop?
Thanks in advance for any assistance