MD_MaintenanceFrequencyCode

Identifier: ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode
Definition: frequency with which modifications and deletions are made to the data after it is first produced
Canonical URI: https://schemas.isotc211.org/resources/codelists/codelists.xml#ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode
Defined values: 15 codes

Value	Description	Fragment ID
`continual`	resource is repeatedly and frequently updated	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_continual`
`daily`	resource is updated each day	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_daily`
`weekly`	resource is updated on a weekly basis	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_weekly`
`fortnightly`	resource is updated every two weeks	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_fortnightly`
`monthly`	resource is updated each month	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_monthly`
`quarterly`	resource is updated every three months	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_quarterly`
`biannually`	resource is updated twice each year	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_biannually`
`annually`	resource is updated every year	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_annually`
`asNeeded`	resource is updated as deemed necessary	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_asNeeded`
`irregular`	resource is updated in intervals that are uneven in duration	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_irregular`
`notPlanned`	there are no plans to update the data	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_notPlanned`
`unknown`	frequency of maintenance for the data is not known	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_unknown`
`periodic`	resource is updated at regular intervals	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_periodic`
`semimonthly`	resource updated twice a monthly	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_semimonthly`
`biennially`	resource is updated every 2 years	`ISO19115-1.1.mmi.MD_MaintenanceFrequencyCode_biennially`