|Zoom, Semantic Search Engine - Online Reference Manual|
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When using several criteria to carry out a search, the [And] and [Or] options (accessible at the bottom of the [Criterion] tabsheet) will help you to choose between two default query strategies:
-[And]: the documents sought must contain all the criteria,
- [Or]: the documents sought must contain at least one criterion.
For example, if you carry out a query by using the words "cat" and "dog" combined with [And], the semantic search engine will only display the documents containing both notions of cat and dog. Otherwise, if you combine these two criteria with [Or], the software will display all the documents containing cat or dog (or both).
The counter displayed next to each file shows either the sum of criteria found in the document (i.e. the occurrence frequency of the total number of words found), or a pertinence factor (i.e. the number of words weighted both by the number of criteria and by the size of each text).
Using several search criteria combined with [And] enables you to reduce the number of documents found and, in general, to raise the relevance of the result. On the other hand, using several criteria combined with [Or] enables you to extend the field of the search. Another approach is to carry out a search on rather wide criteria, and to navigate the results (subclassed by theme) with the Scenario, which gives you the possibility to easily reduce the amount of information obtained.
If you find that Zoom displays too many documents that are not really relevant to what you are searching for, use several criteria combined with [And]. Otherwise, if you think that Zoom does not display all the documents of interest to you, do not hesitate to use several criteria combined with [Or].
Furthermore, the software will suggest that you replace each of your criterion with the equivalent class it is contained into (the classes are preceded by arrows in the list). Thus, according to the information you want to find, you can extend or narrow the field of the search by using broader or finer concepts.
To replace your criterion with a broader concept, check the corresponding box.
For example, if your search criterion is the word "station wagon", the software will suggest that you replace it with broader Equivalent classes (meanings), such as "car", "ground transport", or just "transport". If you replace "station wagon" with "transport", the software will also search for texts containing notions such as rail transport, air transport, sea transport, bicycles, etc.
The [Criterion] list also enables you to avoid the ambiguities that may occur on the meaning of the words you are searching for. In the example below, you see that the word "silver" can be related to very different meanings: "colors", "tableware", "metal".
You must solve these ambiguities by replacing your criterion with the appropriate meaning before starting the search. It is indeed rather unlikely that you might be searching for texts dealing at the same time with colors, tableware and metal.
You can also use the logical operators [+] (required criterion) and [-] (unwanted criterion) before each word searched. For instance, with a search on [+cooking +meat -fish], you will get all the documents containing the concepts of "cooking" and "meat", but not of "fish".
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