frequency with which modifications and deletions are made to the data after it is first produced
MD_MaintenanceFrequencyCode
resource is repeatedly and frequently updated
continual
resource is updated each day
daily
resource is updated on a weekly basis
weekly
resource is updated every two weeks
fortnightly
resource is updated each month
monthly
resource is updated every three months
quarterly
resource is updated twice each year
biannually
resource is updated every year
annually
resource is updated as deemed necessary
asNeeded
resource is updated in intervals that are uneven in duration
irregular
there are no plans to update the data
notPlanned
frequency of maintenance for the data is not known
unknown
resource is updated at regular intervals
periodic
resource updated twice a monthl
semimonthly
resource is updated every 2 years
biennially