using long and descriptive file names

Does the use of more descriptive file names improve search engine rankings?

[sdinenno]

When reviewing Google results pages, I have noticed that search terms are highlighted where they appear in file names. So I'm assuming that Google rankings are somewhat influenced by the file names one chooses for his documents, and that results can be improved by using more descriptive file names (even though I've never read anything which confirms this). Does anyone know whether I am correct in my assumptions?

For example, if I had written an article about Dwarf Japanese Red Maple trees and posted it on a web site, would it make any difference in Google rankings (or any of the other major SE's), if I used the file name "maple.htm" or if used the file name "dwarf_japanese_red_maple.htm"? It seems to me that, if all else is equal, the more descriptive file name would result in a higher ranking.

[shahid]

Yes, URL is one of the factors. If you name file as a keyword and the URL becomes yoursite.com/keyword1.html it is counted and not just google but also on other search engines.

[DaveAtIFG]

"dwarf_japanese_red_maple.htm"

There is a limit to the length of a file name an SE will index, which probably varies from SE to SE. Studying the SERPs should give a pretty good indication of the limit.