IEC 61747-2-1:2013 serves as a Blank Detail Specification (BDS) for a high quality approval system and contains requirements for style and layout and minimum content of detail specifications. These requirements are applicable when the detail specification is published (e.g. for standard product). This second edition of IEC 61747-2-1 cancels and replaces the first edition published in 1998, and constitutes a technical revision. The main changes from the previous edition are as follows: - several words and test conditions were added in Clause 7 and Clause 8; - the new edition was editorially changed according to the current ISO/IEC Directives - Part 2.