We have updated CDF note 4103 to reflect the final ISL geometry and DAQ layout. This note presents a unified numbering and naming convention for the SVX-II and ISL. This scheme can be used in detector assembly, online data acquisition electronics, offline event reconstruction, and detector operations. Single readout elements (strips) require 23 bits for complete specification. John Conway David Stuart Kerry Woodbury Joseph Boudreau Todd Huffman Posted to $CDF_PUB/cdf4103_svx_isl_naming.ps http://www-cdf.fnal.gov/cdfnotes/cdf4103_svx_isl_naming.ps (This is revision # 1.) Posted by conway@cdfsga