a0d929ca_WSRP_v2_0_Specification__Statement_text
[#] CS059 [Section] 5.1.16 [Statement text] 
The mimeType field MUST be specified whenever markup is returned, and if the markupBinary field is used to return the markup, the mime type MUST include the character set for textual mime types using the syntax specified in RFC1522 (e.g. "text/html; charset=UTF-8"). In this particular case this character set MAY be different than the response message.
WSRP v2.0 Specification
Statement text