Omgili

Advanced Search Made Easy

Once you know the basics of Omgili search, you might like to learn some of the advanced search tips and tricks, which offer numerous options for making your searches more precise and getting more useful results.

Searching within specific forums

You can use Omgili to search only within one specific forum by entering the search terms you're looking for, followed by the word "inforum" and a colon followed by the domain name.

For example, here's how you'd find information on the phpBB forums:

Wildcard Searches

Omgili supports single character wildcard searches.

To perform a single character wildcard search use the "?" symbol.

The single character wildcard search looks for terms that match that with the single character replaced. For example, to search for "text" or "test" you can use the search:

te?t

Note: You cannot use the ? symbol as the first or last character of a search.

Boosting a Term

Omgili provides the relevance level of matching documents based on the terms found. To boost a term use the caret, "^", symbol with a boost factor (a number) at the end of the term you are searching. The higher the boost factor, the more relevant the term will be.

Boosting allows you to control the relevance of a document by boosting its term. For example, if you are searching for

http server

and you want the term "server" to be more relevant boost it using the ^ symbol along with the boost factor next to the term. You would type:

http^2 server

This will make documents with the term server appear more relevant. You can also boost Phrase Terms as in the example:

"mother board"^4 asus

By default, the boost factor is 1. Although the boost factor must be positive, it can be less than 1 (e.g. 0.2)

Boolean operators

Boolean operators allow terms to be combined through logic operators. Omgili supports AND, "+", OR, NOT and "-" as Boolean operators(Note: Boolean operators must be ALL CAPS).

  • OR - The OR operator is the default conjunction operator. This means that if there is no Boolean operator between two terms, the OR operator is used. The OR operator links two terms and finds a matching document if either of the terms exist in a document. This is equivalent to a union using sets. The symbol || can be used in place of the word OR.
  • AND - The AND operator matches documents where both terms exist anywhere in the text of a single document. This is equivalent to an intersection using sets. The symbol && can be used in place of the word AND.
  • + - The "+" or required operator requires that the term after the "+" symbol exist somewhere in a the field of a single document.
  • NOT - The NOT operator excludes documents that contain the term after NOT. This is equivalent to a difference using sets. The symbol ! can be used in place of the word NOT.
    Note: The NOT operator cannot be used with just one term. For example, the following search will return no results:
  • - - The "-" or prohibit operator excludes documents that contain the term after the "-" symbol.

Grouping

Omgili supports using parentheses to group clauses to form sub queries. This can be very useful if you want to control the boolean logic for a query.

To search for either "virus" or "spyware" and "remove" use the query:

(virus OR spyware) AND remove

This eliminates any confusion and makes sure you that website must exist and either term virus or spyware may exist.

Field Grouping

Omgili supports using parentheses to group multiple clauses to a single field.

To search for a title that contains both the word "best" and the phrase "search engine" use the query:

intitle:(+best +"search engine")



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