What's the difference between UPnP AV and DLNA?

Am I right in thinking that if I'm DLNA 1.5 compliant, I've implemented UPnP AV? What does DLNA get me besides specifying minimum format requirements? Isn't DLNA built on top of UPnP? I know for sure that DLNA device discovery is completely based on SSDP (UPnP's device discovery protocol). Does DLNA add something in the content discovery or content delivery specification?

For example, Boxee and XBMC b开发者_C百科oth support UPnP - don't they work with all DLNA devices?

Looking at the DLNA and UPnP whitepapers,

1. UPnP and DLNA are different although they look to solve similar problems
2. DLNA adopts very specific things from UPnP (see DLNA whitepaper page 5). It's incorrect to say DLNA is a subset of UPnP.
3. A DLNA device will be able to discover a UPnP server but might not be able to do anything more if both the sides don't agree to an AV format. I haven't verified this. It's more of what I understand after reading the papers.

Looking at this, it seems like the XBMC server does not support DLNA. That would explain the above situation.

As far as I understand, DLNA is a subset of the UPnP standard and specifies less options and more strict formats. For getting a DLNA certified device you need to a lot of money to the DLNA forum which in return checks your device, that it works with other DLNA devices.

Because of UPNP beeing not so specific your UPNP device isn't automatically a DLNA device, e.g. my new DLNA Samsung TV is unable to access the upnp server of xbmc.