I'm trying to work with the FieldHistoryArchive object and am confused by versions. It shows as an object in the Spring 15 docs (which is the version we're on), but the implementation guide (https://help.salesforce.com/help/pdfs/en/field_history_retention.pdfOhNcQ&bvm=bv.95039771,d.aWw) seems to say it is for Summer 15. Anyone able to use this object (I'm trying to use it via SOQL)?

I'm trying to work with the FieldHistoryArchive object and am confused by versions. It shows as an object in the Spring 15 docs (which is the version we're on), but the implementation guide (https://help.salesforce.com/help/pdfs/en/field_history_retention.pdfOhNcQ&bvm=bv.95039771,d.aWw) seems to say it is for Summer 15. Anyone able to use this object (I'm trying to use it via SOQL)?