Abbreviation for the Latin term Regina (queen) or Rex (king) to refer to the prosecution, which in Canada is, in theory, brought in the name of the sovereign. The “R.” appears in the style of cause or name of a criminal case, as in R. v. Boucher. The “v.” is the abbreviation for “versus” (or against). For adults, the last name of the accused is used in the style of cause. For young persons, because of the prohibition on publication of identity in section 110 of the YCJA, law reports use the initials of the youth’s name (e.g. R. v. A.B.); the editorial conventions of some law reports call for use of the first initial of the last name, generally followed in brackets by the first and other initials (e.g., R. v. B.(A.)).