CERN Drawing Directory

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

• Creation of a new drawing
  This is one of the main operations in C.D.D. and it consists of the creation of a brand new drawing and so its first version. User has to enter the drawing information. Once the drawing has been created, a drawing number (also known as the drawing identifier) is assigned to it and displayed.

• Upload of a drawing file
  This is a way to sent drawing files from your design office to CERN, in order to be archived.
  Click the Upload link in the CDD Home Page.

• Creation of a new version of an existing drawing
  When a new version of an existing drawing has been issued, this operation creates a new instance in the database corresponding to the new version.

• Modification of an existing drawing
  This operation consists on the modification of some pieces of information associated to the last version of a drawing, without having to create a new one. Some modifications may not be allowed, depending on the kind of information to be changed and the status of the version.

• Deletion of a drawing version
  This operation lets user delete the last version of a drawing or the drawing itself. This is possible only in case the archival process has not already begun.

• Drawing information retrieval
  The aim of this operation is to allow user to obtain the whole information about any version of a drawing. Access to one particular drawing is performed using query criteria chosen by user.

• Drawing control
  This operation allows user to electronicaly sign the last version of a drawing, or a whole set of drawings. This is possible considering control access given to user and control rules that apply.

• Drawing approval
  After a drawing has been controlled and archived, it may go through an approval process. Several approvers indicate via CDD Web if they accept or reject it. The approval responsible for the group, according to the received comments, decides at the end to accept or to reject the drawing.

• See approved drawings
  Any user has the ability to consult the list of the approved drawings by group.

• Drawing plotting
  This operation is used in order to plot an archived version of a drawing.

• Drawings classification
  Different operations allow user to classify many drawings into folders.

C.D.D. Support Team

There is a support team always ready to answer to every question or problem.
Just email to EDMS.Support@cern.ch.

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

• Easy Links : how to create a link that directly loads a drawing.
• Jump Links : how to create various links that direclty jump to a specific page of CDD.
• List of drawings : how to obtain a list of drawings that can be read by Excel (CSV file).