In system lexical contextual search is realized. It means, that documents can be found, if you specify, what terms (words, abbreviations, records of numbers, dates..) should contain in it.
For drawing up of inquiry about search of the necessary documents it is necessary to take advantage of tools the search panel.
If you are not sure, that the database contains documents with the necessary terms, it is possible to take advantage of a mode of viewing the dictionary of base for a choice of suitable terms directly from a database.
In addition, under the discretion of the developer giving service of access to base, in the interface special means of navigation (hierarchical qualifiers, navigation charts etc.) can be included. In this case the menu of the interface contains item ' Navigation '.
The search panel is intended for drawing up of simple and/or complex queries (см. expanded query) to search of database documents.
The top part of the search panel contains the list of the executed queries. It if necessary allows to return to viewing the previous results of search.
Management of search is carried out with the help of switches:
New search
- search among set of all documents of base;
other switches allow to specify already executed searches:
search in found
add to found
exclude from found
The basic controls of the search panel is the search query input line. In it it is necessary to type terms which should contain in required documents.
So, for example, if you in the input line will type :
voltmeters ammeters
and will press the button (), that the system will find all documents which contain even one of words voltmeters OR a word ammeters.
If it is necessary, that the pair (or it is more) terms contained in the required document simultaneously, it is necessary to take advantage of the logic operator AND or & (operators of logic are separated from terms by a blank)
For example,
transformer & voltage
or
transformer AND voltage
(this record is equivalent to search query: find all documents which simultaneously contain words transformer AND voltage).
The endings of terms can be masked with the help of a symbol *.
For example,
transform* & volt*
Record of conditions of entry for search terms in the text of the document can contain parentheses which determine the order of search.
For example, record
transform* & (volt* curr*)
is equivalent to inquiry about search of documents containing transformers of a voltageORtransformers of a current.
In some cases there is a necessity not only to specify, what terms should contain in required documents, but also what terms should be absent in them . For this purpose it is possible to take advantage of the logic operator NOT. For example, if you are interested with all hydrometers, except for hydrometers of petroleum, it is possible to make the following inquiry
hydromet* NOT petrol*
,
That is equivalent to desire to find all documents containing words, beginning on hydromet, except for the documents containing words, beginning onpetrol.
The given mode to become accessible if you make active the appropriate switch on the search panel.
In this case the opportunity flexibly to operate is given you search of necessary documents. You in addition can formulate conditions of an arrangement of search terms in various fragments of documents.
It is necessary to have in view of, that search terms can settle down in different parts of the document (including latent for viewing as the list). The concrete set of accessible search fragments is defined for each database by the developer giving service of access to the information.
So for example, if the database has such fragments as the Name of the device and the Manufacturer , a word < i class=H > transformer can settle down both in the name of the device, and in the name of the manufacturer (the factory "Transformer").
As each document is broken on semantic parts, you can limit area of entry of search terms to a concrete fragment. For example, the same inquiry < i class=H > трансформатор* AND is intense * you can to type in area the Name of the device . In this case you will find documents which necessarily contain the listed terms in the name of the device. If you want to find out, that makes a factory "Transformer", you should type(collect) a word < i class=H > the transformer in area the Manufacturer .
In the given mode viewing the list of the found documents is carried out. This mode is included automatically each time when the search inquiry is carried out.
The big lists of the found documents are displayed by portions. Moving under the list is carried out by buttons:
() - The first portion;
() - The previous portion;
() - The next portion;
() - Last portion (N - the number of last accessible document);
All search inquiries are stored during a session of interaction with a database. You have an opportunity to return to the previous results, choosing active inquiry from the list of the executed inquiries. The list of the executed inquiries is located in the top part of the search panel. Thus, in a mode ' Documents ' you look through set of active inquiry documents.
As a rule, the displayed list of documents of active inquiry contains the limited information. Each document is submitted by a small set of fragments from each found document. For viewing the full text of the document elements of the list can contain the appropriate hyperreference if it is stipulated by the developer, giving service of access to base. In this case there is an opportunity of viewing of the full text of the document in a separate window.
Внимание! The quantity of documents accessible to viewing can be limited on the part of the developer giving service of access to base. In this case it is necessary to specify inquiry about information search.
The given mode is possible in case it is stipulated by the developer giving service of access to a database. Special means of navigation can include hierarchical qualifiers and - or navigation maps .
Qualifiers represent sets of hierarchically enclosed units. For viewing units of the bottom level it is enough to click the left button of a mousy by name unit of the top level. Repeated click closes contents of the top unit.
To each unit there corresponds the certain set of documents of base.The quantity of these documents is displayed on the button located to the left of a name of unit. For transition to viewing of the chosen set it is enough to click the left button of a mousy by the button displaying quantity(amount) of documents for chosen unit.
Navigation maps represent tables of a combination of various attributes of selection of documents. Each cell displays quantity of the documents satisfying a combination of attributes, submitted on a map.
Marking the left button of a mousy the necessary combinations of attributes, you create conditions of selection of documents of base. For transition to viewing the selected set it is necessary to take advantage of the button (< label class=B > search ), located on the right on search panel. The button (< label class=B > reset ) allows to reset all marks on a map.
In the top part of the control panel viewing of the dictionary locates a line for input of the first symbols since which viewing the terms contained in documents of a database is carried out. After input of these symbols it is necessary to press the button (< label class=B > show ).
Instead of input of the first symbols it is possible to take advantage of buttons of the alphabet, preliminary having chosen its type (cyrillic, latin, symbols).
The terms located in any fragment of the document are by default deduced. However, you can make a choice of a concrete fragment, having specified area of entry of terms interesting you in a falling window with the list of accessible fragments.
Additional adjustment of viewing of the dictionary is the quantity столбцов displays of the list of terms.
Terms of the dictionary are deduced by portions. At the end of the list there is a button (< label class=B > next ) for addition of the next portion.
Each displayed term of the dictionary of a database can be marked for inclusion in search inquiry. The list of the marked terms is displayed on the right. If you have casually noted not that term, click the left button of a mousy in the field of its mark.
For performance of inquiry about search of documents with the marked terms, press the button (< label class=B > search ), located on the right on search panel. The button (< label class=B > reset ) allows to reset all marked terms .