The extension name ".XLXS" should be ".XLSX"
Section 3.2 Correction:
Proposed by: Hans-Peter Koning
Defined Need: Change restriction defined by section 3.2 MAY NOT or SHALL NOT indicates an element is prohibited from use.
Replace MAY NOT with MUST NOT
Encryption Extra Field:
Proposed by: PKWARE
Define Need: Smartkey storage format
Document 0x0022 Key Provider Record