International Tables for Crystallography
| dREL: an embedded dictionary algorithm language International Tables for Crystallography (2026). Vol. G, ch. 2.5 [ doi:10.1107/97809553602060000995 ] Abstract dREL is a dictionary relational expression language. It was developed to allow machine validation of data relationships expressed as algorithmic methods in CIF dictionaries. This chapter describes the underlying philosophy and history of dREL, and gives a detailed account of its language syntax, grammar and built-in functions. Examples are given of its use in modifying dictionary definitions, evaluating missing values and use in validating CIF data files. |
Access, prices and ordering
International Tables for Crystallography is available online as a full set of volumes through Wiley.
 |
If you have already registered and are using a computer listed in your registration details, please email [email protected] for assistance.
About International Tables for Crystallography
International Tables for Crystallography is the definitive resource and reference work for crystallography. The multi-volume series comprises articles and tables of data relevant to crystallographic research and to applications of crystallographic methods in all sciences concerned with the structure and properties of materials.