Directions how to make use of the WWW interface

General hints
Possibilities to determine a DFG key for equipment groups
	Pre-assignment of a key text (recommended procedure)
	Pre-assignment of a key text (previous procedure)
	Pre-assignment of a DFG key
Additional hints concerning the use of wildcards, and capitalization
Additional hints concerning the choice of options
	Pre-assignment of sort criteria
	Treatment of search text
Examples

General hints

When using the WWW-Interface in order to find DFG key texts and corresponding DFG keys, keep in mind that entries for key texts are in german language (at least for the moment). I.e. key texts may contain special german characters ("ä","ö","ü","ß","Ä","Ö","Ü"). Further keep in mind that the key text always denotes the plural of the term specifying the equipment.

In order to provide a better survey, not only equipment groups -- but also main- and upper groups assiciated with equipment groups -- are included in the data. Main- and upper groups may be identified by their DFG key entries containing wildcard "-". In this context, DFG key "2--" refers to main group "2--" of upper groups "20-", "21-", ..., "29-"; corresponding to equipment groups 200-299. (Here, "21-" denotes the upper group of equipment groups 210-219.) Of course, the texts for main and upper groups are too inaccurate for classification of equipment; i.e. always the DFG keys of equipment groups itself MUST be used in the DESY procurement procedure!

Possibilities to determine a DFG key for equipment groups

The following possibilities to determine a DFG key are supplied:

Additional hints concerning the use of wildcards, and capitalization

In order to achieve fragmentational entries of DFG keys and key texts as search criteria, the use of wildcards is supported. Use "*" to substitute character strings and "?" to substitute single characters. PLEASE: Use wildcard "?" to substitute special german characters (Ä,ä,Ö,ö,Ü,ü,ß) when querying the database, IF no german keyboard is available!

Query results are case insensitive.

Additional hints concerning the choice of options


Examples:

Example for the recommended procedure to search a DFG key under pre-assignment of a key text:

(Pre-assignment of option 'Search criteria automatically enclosed in wildcard'.)

For existing entry related to Search text, the most favorable case would be to directly achieve the corresponding DFG key. But in case of an uncertain determination, one has to make sure, that the searched term fits the remaining entries for the equipment group. This is done with a consecutive query. (Attention: main and upper groups, i.e. entries of the form "1--" or "11-" in DFG key, may NOT be detailed by this procedure.)

(For non-existing entry related to Search text, proceed as explained in the example for possible DFG key determination)

Example for the previous procedure to search a DFG key under pre-assignment of a key text:

(Choice of option 'Search criteria as pre-assigned'!)

For existing entry related to Search text, the most favorable case would be to directly achieve the corresponding DFG key. But in case of an uncertain derivation, one has again to make sure that the searched term fits the remaining entries for the equipment group. This is again done with a consecutive query. (For non-existing entry related to Search text, proceed as explained in the example for possible DFG key determination)

Example for the pre-assignment of a DFG key :

Example for possible determination of a DFG key :

Example for the preparation of a comprehensive survey :

In case the procedure to find a DFG key by means of pre-assigning key texts (and character strings) does not lead to a satisfying determination, it is possible to use different ways to get some survey of generally available entries for key texts: