MIL-HDBK-2361B (AC) - ARMY DIGITAL PUBLICATIONS DEVELOPMENT IMPLEMENTATION GUIDE. This handbook provides guidance on the implementation of Standard Generalized Markup Language (SGML) and Extensible Markup Language (XML) as it pertains to MIL-STD-2361, Department of Defense, Interface Standard, Army Digital Publications. This handbook is for guidance only. This handbook cannot be cited as a requirement. If it is, the contractor does not have to comply.