Update the dictionary description.

cif_core.dic

@@ -10,15 +10,16 @@ data_CIF_CORE
  _dictionary.title CIF_CORE
  _dictionary.class Instance
  _dictionary.version 3.3.0
- _dictionary.date 2024-05-15
+ _dictionary.date 2024-05-17
  _dictionary.uri
  https://raw.githubusercontent.com/COMCIFS/cif_core/master/cif_core.dic
  _dictionary.ddl_conformance 4.2.0
  _dictionary.namespace CifCore
  _description.text
 ;
- The CIF_CORE dictionary records all the CORE data items defined
- and used within the Crystallographic Information Framework (CIF).
+ The CIF_CORE dictionary defines data items that are common to all domains
+ of crystallographic studies. These definitions are mostly used within the
+ Crystallographic Information Framework (CIF).
 ;
 
 save_CIF_CORE_HEAD
@@ -27860,7 +27861,7 @@ save_
  Changed the purpose of the _diffrn_radiation_wavelength.id data item
  from 'Encode' to 'Key'.
 ;
- 3.3.0 2024-05-15
+ 3.3.0 2024-05-17
 ;
  # Please update the date above and describe the change below until
  # ready for the next release
@@ -27935,4 +27936,6 @@ save_
  Changed the title of the dictionary to 'CIF_CORE'.
 
  Renamed the Head category from 'CIF_CORE' to 'CIF_CORE_HEAD'.
+
+ Updated the dictionary description.
 ;