CERN -- European Laboratory for Particle Physics

CERN Drawing Directory

Welcome to the Cern Drawing Directory General Information Page !

Click here What is C.D.D. ? Click here Connect to CDD Web
Click here Life Cycle of a drawing Click here CDD Web utilities
Click here Standard operations of C.D.D. Click here HPGL Viewer
Click here C.D.D. Support Team Click here What's new in version 1.2a ?
Click here C.D.D. user's manual: PostScript or Acrobat file Click here Statistics

What is C.D.D. ?

C.D.D. is the acronym for CERN Drawings Directory.

It is a multi-platform utility which manages engineering drawings made in any division at CERN. The aim of C.D.D. is not to store the graphical drawing itself, but to store a reference with every information related to the drawing. Access into this data is provided via a graphical interface based upon Oracle Forms (CDD) or the World Wide Web (CDD Web).

Drawings following different numbering systems and different management rules can be handled by C.D.D.The only condition is that those particular functionalities are well defined.

Several drawing systems have been identified at CERN and were therefore considered when designing the application. The current version of CDD focuses on the following naming systems: EST (which is principally used for the LHC project), LEP, ST-IE, SPS, ST-CE, ALICE, ATLAS, CMS and LHC-b. Other CERN systems can be easily integrated on demand.

Life cycle of a drawing

First, designers create their drawings using one of the available CAD (Computer Aided Design) tools at CERN, which are AutoCad, Euclid or ProEngineer.

Then, via C.D.D., the drawings information are entered in a database. This operation might be done either automatically from the drawing tool, or manuallY if the user starts C.D.D. himself.

Once the drawing exists in the database, it's informations can be modified, controlled, approved, classified and consulted, according to the rules defined for each drawing system at CERN, using the C.D.D. application.

When a drawing is ready to be archived, it is automatically stored in HPGL format. Once the archival process is over, the drawing can be visualised but no more modified.

     Life cycle scheme

The archiving process may not be completed for some various reasons. Here is a list of the possible archiving errors, the reason why they occurred and what to do in some cases.

For further information on drawing management see the note CDD-Sibelius Drawing Management.

Standard operations of C.D.D.
C.D.D. Support Team

There is a support team always ready to answer to every question or problem.
Just email to

C.D.D. user's manual & other documents

Get the user's manual in PostScript or Acrobat file.

EDMS Seminar Presentation of April 9th, 1998 (Power Point 97 file)

C.D.D. Utilities

Go to TS Dept. Home page
Creation date: 1997-02-26, Last update : 2007-09-05 by SP