> For the complete documentation index, see [llms.txt](https://docs.os.uk/osngd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.os.uk/osngd/code-lists/code-lists-overview/namedperiodvalue.md).

# namedperiodvalue

This code list is used in association with the Named Period attribute which is present within the Restriction, Special Designation Area, Special Designation Line, and Special Designation Point Feature Types in the OS RAMI Collection. The code list describes specific periods when a restriction may apply.

| Label                        | Definition                                                                                           |
| ---------------------------- | ---------------------------------------------------------------------------------------------------- |
| Extreme Weather              | A period when weather conditions are dangerous.                                                      |
| Firing Times                 | A period when the activities of defence forces make it unsafe.                                       |
| Local Times Apply            | A time which varies locally.                                                                         |
| School Arrival And Departure | The time when pupils will be arriving for the start of the school day and the end of the school day. |
| School Holidays              | A period when schools are closed.                                                                    |
| School Hours                 | The period of the day when schools are open.                                                         |
| Special Arrangements         | No definition available.                                                                             |
| Term Time                    | A period when schools are open.                                                                      |


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