The combining forms of nominals in final /-u/ vary across the regions of the Basque Country. The /u/ can stay unchanged, be lowered to an /a/, or it can be lost. Loss is most common in the east, while lowering is most common in the west. For instance, buru, "head", has the combining forms buru- and bur-, as in buruko, "cap", and burko, "pillow", whereas katu, "cat", has the combining form kata-, as in katakume, "kitten". Michelena suggests that the lowering to /a/ is generalised from cases of Romance borrowings in Basque that retained Romance stem alternations, such as kantu, "song" with combining form kanta-, borrowed from Romance canto, canta-.
Jacobsen, William H. Jr. (1999): "Basque Language Origin Theories" In Basque Cultural Studies, edited by William A. Douglass, Carmelo Urza, Linda White, and Joseba Zulaika, 2743. Basque Studies Program Occasional Papers Series, No. 5. Reno: Basque Studies Program, University of Nevada, Reno.
Lakarra Andrinua, Joseba (1998): "Hizkuntzalaritza konparatua eta aitzineuskararen erroa" (in Basque), Uztaro 25, pp. 47110, (includes review of older theories).
Lakarra Andrinua, Joseba (1999): "N-De-N" (in Basque), Uztaro 31, pp. 1584.
Morvan, Michel, 1996. The linguistic origins of basque (in French). Bordeaux: Presses universitaires. pp. 2595.
Trask, R.L. (1995): "Origin and Relatives of the Basque Language : Review of the Evidence" in Towards a History of the Basque Language, ed. J. Hualde, J. Lakarra, R.L. Trask, John Benjamins, Amsterdam / Philadelphia.
Trask, R.L.: History of Basque. New York/London: Routledge, 1996. ISBN 0-415-13116-2; pp. 358414.
The specifications were formalized by the Bluetooth Special Interest Group (SIG). The SIG was formally announced on 20 May 1998. Today it has a membership of over 30,000 companies worldwide. It was established by Ericsson, IBM, Intel, Toshiba and Nokia, and later joined by many other companies.
All versions of the Bluetooth standards support downward compatibility. That lets the latest standard cover all older versions.
The Bluetooth Core Specification Working Group (CSWG) produces mainly 4 kinds of specifications
The Bluetooth Core Specification, release cycle is typically a few years in between
Core Specification Addendum (CSA), release cycle can be as tight as a few times per year
Core Specification Supplements (CSS), can be released very quickly
Errata (Available with a user account: Errata login)
The Bluetooth Network Encapsulation Protocol (BNEP) is used for transferring another protocol stack's data via an L2CAP channel. Its main purpose is the transmission of IP packets in the Personal Area Networking Profile. BNEP performs a similar function to SNAP in Wireless LAN.