IEC 62351-11:2016 specifies schema, procedures, and algorithms for securing XML documents that are used within the scope of the IEC as well as documents in other domains. This part is intended to be referenced by standards if secure exchanges are required, unless there is an agreement between parties in order to use other recognized secure exchange mechanisms. This part of IEC 62351 utilizes well-known W3C standards for XML document security and provides profiling of these standards and additional extensions.