Issue link: https://iconnect007.uberflip.com/i/1166358
58 PCB007 MAGAZINE I SEPTEMBER 2019 • The portable document format version of the list in appendices provides the CAS number of the individual substances, but not the XML schema of the list element, the "substance category" element (Table 4 and Figure 6); this is an opportunity for enhancing the data accuracy The next section addresses some limitations of the structure of the lists with IPC and IEC standards and also lack of harmonization that is the primary issue. The IPC-1751 committee (2-18) has put in place a subcommittee last year to work on an IPC-175x harmonization initiative. The pur- pose of this initiative is to establish the IPC- 1751 as the common foundation of the IPC- 175x series, to implement the schema with a modular approach to avoid duplication of schema elements, and for the end users to get the best from each standard and to be able to declare various sectionals from each standard Table 3: Extract of "IPC-1752A Amendment 3, Appendix B, Table B1: RoHS Substances." (Source: IPC) Table 4: REACH candidate list substances with CAS numbers as provided by ECHA Table D1. Figure 6: Substance category element in IPC-1752 Class C list.