> [...] a class of memory that is of unknown and dynamically variable size, is addressable only indirectly by the kernel, can be configured either as persistent or as "ephemeral" (meaning it will be around for awhile, but might disappear without warning), and is still fast enough to be synchronously accessible [...]

did they mean "transient" rather than "transcendent"?!

A more detailed link in addition to the one above:

http://oss.oracle.com/projects/tmem/