Ed-Fi Data Standard v2.2a are identical to the Data Standard v2.0 schema except for the Assessment schema and the changes to the core XSD definitions.
For simplicity and completeness, all 21 schema are published here.
Bulk Data Specifications (XSD)
The following link is a ZIP archive containing all the Standard Interchange Schema XSD for Ed-Fi v2.2a along with the Ed-Fi Core XSD for each schema: Ed-Fi-v2.2a-Bulk-XSD-Bundle.zip