Data Item _citation.id
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General 
- Item name
- _citation.id
- Category name
- citation
- Attribute name
- id
- Required in PDB entries
- yes
- Used in current PDB entries
- Yes, in about 99.8 % of entries
Item Description
The value of _citation.id must uniquely identify a record in the
CITATION list.
The _citation.id 'primary' should be used to indicate the
citation that the author(s) consider to be the most pertinent to
the contents of the data block.
Note that this item need not be a number; it can be any unique
identifier.
Item Example1
primary
Item Example2
1
Item Example3
2
Data Type 
- Data type code
- code
- Data type detail
- code item types/single words ...
- Primitive data type code
- char
- Regular expression
- [][_,.;:"&<>()/\{}'`~!@#$%A-Za-z0-9*|+-]*
Child Data Items 
- _citation_author.citation_id
- _citation_editor.citation_id
- _em_2d_crystal_grow.citation_id
- _em_2d_projection_selection.citation_id
- _em_3d_reconstruction.citation_id
- _em_image_scans.citation_id
- _em_imaging.citation_id
- _em_sample_support.citation_id
- _em_vitrification.citation_id
- _pdbx_feature_assembly.feature_citation_id
- _pdbx_feature_domain.feature_citation_id
- _pdbx_feature_entry.feature_citation_id
- _pdbx_feature_monomer.feature_citation_id
- _pdbx_feature_sequence_range.feature_citation_id
- _pdbx_reference_molecule_related_structures.citation_id
- _software.citation_id
Aliases
| Alias Item Name | Dictionary Name | Dictionary Version |
|---|---|---|
| _citation_id | cif_core.dic | 2.0.1 |