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Entry: version mask code

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URI: http://reference.metoffice.gov.uk/um/c4/stash/version_mask    

A 20 digit binary code. Each STASH section can have up to 20 versions, and each version uses some subset of the item numbers in that section. Version 0 of a section is the null version, i.e. that section is not activated, so none of the STASH items in that section would be available to the run. The UM inputs define which versions of each section are available. Some sections use i_

_vn runtime variables to select the various versions, other only have a single version available. The version mask digits are numbered from right to left; a 1 in position N implies that this item is available to version N of that section. A 0 implies that it is not. E.g. a section version of 6A (or 6B or 6C, etc.) would have a version mask of 00000000000000100000 A single UM routine src/control/top_level/h_vers_mod.F90 maintains the links between the runtime code and the version mask in the STASHmaster, so to check whether a diagnostic is actually available to a certain code version.

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is a object property | Property
submitted bymarqh (admin)

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date submitted 27 Aug 2014 14:35:03.557
definition
entity version mask code
source graph graph

item class object property | Property
label version mask code
notation version_mask
register stash
status status stable
submitter
name marqh (admin)
openid 100578379482821123729

type register item
version info 1
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Definition

comment A 20 digit binary code. Each STASH section can have up to 20 versions, and each version uses some subset of the item numbers in that section. Version 0 of a section is the null version, i.e. that section is not activated, so none of the STASH items in that section would be available to the run. The UM inputs define which versions of each section are available. Some sections use i_<section>_vn runtime variables to select the various versions, other only have a single version available. The version mask digits are numbered from right to left; a 1 in position N implies that this item is available to version N of that section. A 0 implies that it is not. E.g. a section version of 6A (or 6B or 6C, etc.) would have a version mask of 00000000000000100000 A single UM routine src/control/top_level/h_vers_mod.F90 maintains the links between the runtime code and the version mask in the STASHmaster, so to check whether a diagnostic is actually available to a certain code version.
domain STASH record
label version mask code
range Literal
type object property | Property