tokens: ['The', 'Bo', 'reference', 'point', 'represents', 'the', 'intrabillingdomain', 'interface', 'for', 'the', 'CDR', 'file', 'transfer', 'from', 'the', 'OCS', 'to', 'the', 'operators', 'postprocessing', 'system', 'The', 'functional', 'requirements', 'for', 'this', 'reference', 'point', 'are', 'similar', 'to', 'those', 'of', 'the', 'generic', 'Bx', 'reference', 'point', 'Reuse', 'of', 'the', 'Bx', 'reference', 'point', 'specification', 'for', 'Bo', 'will', 'be', 'analysed', 'in', 'a', 'later', 'release']