Advanced Search

Enter search term(s) below (Search tips)

How to use this search engine

You can use any of the three search methods that operate on Roll Call’s search engine – Boolean, set logic and natural language. Read below for a brief guide to each:

Boolean
This common search method lets you easily combine terms by using programming devices called "operators" such as "AND," "OR," "AND NOT.” The Roll Call search engine uses this method as the default search system, and assumes the operator “AND” when more than one term is being searched.

AND requires all terms appear in a record.
OR retrieves records with either term.
AND NOT excludes terms.

Parentheses may be used to sequence operations and group words. Parentheses MUST be used when searching using the operator “OR”.

Wild Card Character

For broad searches, you may use an asterisk (*) to represent multiple characters. For example: computer* would return items such as computer, computers, computerized, computeristic, etc. Please note: an "*" may be used only at the end of a search term.

Set logic
Set logic method is based on the mathematical concept of sets. The default behavior of the search is to locate an intersection (or 'AND') of every element within a query. This means that the query; "procurement regulation interface" is the equivalent to the boolean query: "procurement AND regulation AND interface."

Set logic operators

• '-' (without)
  The '-'(minus) is the most commonly used logic symbol. It means the answer should EXCLUDE references to that item.
• '+' (mandatory)
  The '+'(plus) symbol in front of a search item means that the answer MUST INCLUDE that item.

Sets (or lists) of things are specified by placing the elements within parenthesis, separated by commas. Example: (procurement,regulation,interface)

Natural Language Query
This method is based on a close approximation to how people normally phrase questions in spoken communication. You may enter a query in the form of a sentence or question. Key words and phrases within your query will be identified by the search engine, with extraneous words deleted from the search.

Example:
What is the state of the art in text retrieval?
The software will search for:
state of the art AND text AND retrieval.

Search parameters

You may enter specific parameters on the search engine input fields, or you can leave them blank. If you do not change or set the various search parameters, the default search is for all time periods, in all print categories of Roll Call, and ranked with the most recent first.

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