Using Commas in URL

I've encountered some developers wanting to construct URLs using commas.. is there any problems with this? Seems that for the most part commas are not a problem with search engines but is there any downside (or benefits for that matter)?

Do other bots/crawlers/aggregates have issues with them?

 

I think this will cause an error. Why would you want to use a comma anyway?

 

It isn't my decision but those of the developers. I do see websites using them... some big time newspapers, I think ive even seen yahoo news using them, not sure. It seems to be a valid separated but i guess im just questioning why people aren't using them more. Thought maybe it could cause problems, but there really isn't too much out there on the topic so i figured it couldn't be that harmful.

 

I have seen pages with commas not been indexed by google at all, you should make sure they are ok first

 

Here is the answer: http://www.blooberry.com/indexdot/html/topics/urlencoding.htm

I learn something new every day.

 

Unusual name Matt C
Seems familiar somehow?
Ever worked in a chip shop?

 

@Valley, nope - its just my first name and my last initial.

@catanich - so we should be encoding it huh?

 

Unless it is an error, it will not cause any SEO benefit

 

Matt Cutts
LOL

 

I've never seen any domain with a comma at all let alone in Google

 

LOL
That was a nice one.

No cached urls with comma btw:
http://www.google.com/search?q=inurl:,&sourceid=navclient-ff&ie=UTF-8&rls=GGGL,GGGL:2006-19,GGGL:en

 

I can see tones of URLs with comas indexed by Google no problem, but I want to see some official Googler commenting on that

 

Can you give an example because I assert there aren't any cached urls containing commas. And I proved that in my previous post.

 

I'm sorry Wisam74us,
you were right. My query was wrong. They are indexed urls with comma indeed.
Example: xml-sitemaps(dot)com/forum/index.php/topic,1218.0.html

replace (dot) with .