Is this ok?

Can i write my sitemap with url and loc only? such as

  <?xml version="1.0" encoding="UTF-8" ?> 
- <urlset xmlns="http://www.google.com/schemas/sitemap/0.84">
- <url>
  <loc>http://www.sample.com/1.html</loc> 
  </url>

Code (markup):

 

Ya, you can write like that as mentioned above with url and location only.

 

That's totally fine. Although adding other parameters might turn out useful for you.
Are you typing manually, or using some tool to create the map?
Bye

 

i use php to create my sitemap dynamic, there are 80,000 urls, so i must use a sitemap index.
Does google think this is a friendly sitemap?

 

yes you can write your own php xml code or you can use sitemapcreator sites like

http://tools.webmasters.sk/sitemap-creator.php
http://pingoat.com/goat/google_sitemap

and for more info use this

http://code.google.com/sm_thirdparty.html

 

Thats fine, the links in the above post may be useful for you to

 

If you are only using <loc> ...
You might as well create a pure text sitemap file I think

 

sitemap is just a list of urls for SE crawlers to make the crawl easy and it it perfectly ok just to list ur links