(IUCr) CIF Definition save__array_structure.compression_type

DRAFT DICTIONARY CBF/imgCIF Extensions Dictionary | Draft version 1.5 for comment

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Index

##### Image dictionary (imgCIF) version 1.5.4

# _array_structure.compression_type

Name:
`'_array_structure.compression_type'`

Definition:

           Type of data-compression method used to compress the array
                  data.

Type: ucode

Mandatory item: no

The data value must be one of the following:

`byte_offset` | Using the 'byte_offset' compression scheme as per A. Hammersley and the CBFlib manual, section 3.3.3

`canonical` | Using the 'canonical' compression scheme (International Tables for Crystallography Volume G, Section 5.6.3.1) and CBFlib manual section 3.3.1

`none` | Data are stored in normal format as defined by _array_structure.encoding_type and _array_structure.byte_order.

`packed` | Using the 'packed' compression scheme, a CCP4-style packing as per J. P. Abrahams pack_c.c and CBFlib manual, section 3.3.2.

`packed_v2` | Using the 'packed' compression scheme, version 2, as per J. P. Abrahams pack_c.c and CBFlib manual, section 3.3.2.

Enumeration default: none

Category: array_structure

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Copyright © 2005 International Union of Crystallography