[eml-dev] error message

[Xiaoping Wang]

Dear eml community,

Could someone tell me what the following message mean?

cvc-complex-type.2.4.a: Invalid content starting with element 'a'. The 
content must match 
'(((((("":itemizedlist)|("":orderedlist))|("":emphasis))|("":subscript))|("":superscript))|("":literalLayout)){0-UNBOUNDED}'.

Thanks!

Xiaoping