Data Item _axis.system

General

Item name
_axis.system
Category name
axis
Attribute name
system
Required in PDB entries
no
Used in currrent PDB entries
No

Item Description

The value of _axis.system specifies the coordinate system used to define the axis: 'laboratory', 'McStas', 'direct', 'orthogonal', 'reciprocal' or 'abstract'.

Data Type

Data type code
ucode
Data type detail
code item types/single words (case insensitive) ...
Primitive data type code
uchar
Regular expression
[_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Default value
laboratory

Controlled Vocabulary

Allowed Value Details
McStas the axis is referenced to the NeXus/HDF5 McStas laboratory Cartesian
coordinate system
abstract the axis is referenced to an abstract Cartesian coordinate system
direct the axis is referenced to the direct lattice
laboratory the axis is referenced to the imgCIF standard laboratory Cartesian
coordinate system
orthogonal the axis is referenced to the cell Cartesian orthogonal coordinates
reciprocal the axis is referenced to the reciprocal lattice

Controlled Vocabulary at Deposition

Allowed Value Details
McStas the axis is referenced to the NeXus/HDF5 McStas laboratory Cartesian
coordinate system
abstract the axis is referenced to an abstract Cartesian coordinate system
direct the axis is referenced to the direct lattice
laboratory the axis is referenced to the imgCIF standard laboratory Cartesian
coordinate system
orthogonal the axis is referenced to the cell Cartesian orthogonal coordinates
reciprocal the axis is referenced to the reciprocal lattice