Search command

Under Windows, use the built-in search command in your preferred text editor to locate this line if present. 

With regard to the common European market, the European Economic Community (EEC) has undertaken numerous activities concerned with materials and material information systems. In one demonstration program for material databases eleven such databases from various countries in the EEC are being cooperatively developed with joint standards for terminology, data presentation, database access, and the user interface of search commands, aids, and menus. For the materials class of plastics, Polymat was selected to participate in this cooperative work. Interesting developments occur from which the users of central material databases in the entire EEC area can benefit. 

A particular search command can contain dozens of such terms. Obviously, if one is careful about choosing the proper search terms, one can focus in on just the relevant papers, and leave out those that will not be useful. However, there will often be far more papers than can conveniently be handled, and there are other ways to limit searches. One such way is by using a narrow field. For example, a synthetic chemist may wish to find references in which a given compound is synthesized, but find, when he or she searches for that compound, that most of the references concern biological or medicinal uses of the compound. By using the command... 

A relevant citation not only provides the needed content, that is, data and information, it also contains clues to find other relevant citations. The author(s) may have published other relevant articles that can be found with an author search. Future authors publishing on this same topic may have cited this article in their own publication. Science Citation Index provides cited reference searching. The citation can be used as a Rosetta stone to determine the appropriate index term(s) for each bibliographical database searched. Some databases now offer a search command, find related articles, that automates this process. 

Beilstein is a much more comprehensive database, marketed under the name of MDL Crossfire, and requires a subscription fee for access. It contains far more organic substances and lists many more properties. The search commands include ... 

A tabular search using the Fact Editor for the conditions [bp > -40] AND [bp < 0] yields 462 hits in 15 s. Since most of the hits contain heteroatoms other than fluorine, it would be better to reissue the search command for compounds that do not contain any nitrogen [bp > - 40] AND [bp < 0] NOT [ N ], which yields 317 hits in 156 s. The asterisk indicates the wild card that stands for any number of characters of any kind, and the is for a text string. When we refine it further to exclude chlorine... 

Crosshairs appear on the Probe screen, and a dialog box displays the coordinates of the cursors. We would like to mark the point V0h and Vu.. We will search for the x-cooidinate x = Vn, = 2.44. Select Trace, Cursor, and then Search Commands from the Probe menus ... 

We will use a search command similar to the goal functions discussed earlier. Enter the text search xvalue(2.44201) ... 

The dialog box contains our last search command. Modify the text to saarch forward xvalua (3.32) ... 

The information retrieval in MAECIS is accomplished using one of three available commands SHOW, FIND, or SEARCH. The SHOW command is the simplest one to use and requires only a code number or registry number. It allows the user to retrieve all chemical structures and associated information stored under a particular code number. In most cases this fulfills the user s needs. The FIND command is used for complex searches involving various combinations of multiple data fields, handles substructure searching. Queries such structures with a molecular weight between 200 and 250 containing an ester substructure" are handled by the FIND command. Finally, the SEARCH command is used for chemical structure searches. This search takes only seconds and allows the chemist to determine if a particular molecule is already in the database. 

A scientist or engineer seated at any of these terminals may search through the system s indices or browse through the document citations to locate the ones he needs. The citations in the system are those which have appeared in Nuclear Science Abstracts (NSA) since 1967 or which have been compiled into one of the special data bases added to the system. Information from NSA or the special data bases can be selectively retrieved by typing simple search commands on the station s keyboard with the dialog between user... 

QS QS The basic structure/substructure search command. It is entered before the ROSDAL string (linear representation of the structure) is entered or uploaded from MOLKICK. The system uses the ROSDAL string to identify the created set. 

The structures in this hst show various substituents at different sites of the benzene ring as well as different substituents and substitution patterns at location 1, 2, 3, 4, 1 and 2, 1 and 3, etc. of the carbon chain. Thus one search command immediately gives the entire variety of structures containing the phenylbutane skeleton. All fourteen positions of this skeleton would have to be specified as open to obtain the same result by a conventional substructure search. Such a search would be rather time-consuming. 

Anyone with access to the Web can use STN Easy without any knowledge of databases or search commands and without any training. There is no need to install any special front-end software a WWW browser supporting HTML 2.0 with tables and forms is sufficient (recommended are Netscape Navigator 2.0 and above, and Microsoft Internet Explorer 2.0 and above). However, STN Easy, being a commercial service, requires a login ID. 

Fig. 113. Search command for structure search by menu guide...

SCREEN is, along with STRUCTURE, a command on its own and is awarded a separate L number. Prior to entering the SEARCH command, L numbers which were created by the search profile and the screens, should be linked by AND. Doing so, makes you narrow the number of iterations and thus avoid the system s capacity limitations. 

The search commands and search terms are printed in capital letters for a better overview. The number of search hits is mentioned for nearly every search example, also within the text. 

STOP command is used. The WHERE clause of the DISPLAY command Is of the same form as In the SEARCH command and may Include non-structural data as well as structure and substructure search requests. The SEARCH and DISPLAY commands differ in that, while both search the database, save the qualifying registry numbers, and present a "hit count" to the user, the DISPLAY command also displays selected Information at the terminal for each compound. 

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