add link to joined up data
add resource
add validation with list of hard-coded values
add space value document
add time format collection
add space format collection
add MTEF sector collection
add Sector vocabulary collection
add unit-of-measure collection
add
add value
add data serie collection
add uniqueness
validate uniqueness
add uniqueness and time stamps
add uniqueness and presence
add timestamps and uniqueness
add timestamps
add timestamps and validate presence
cleanup