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Search Help and Tips

Case-sensitivity

The search engine is case-insensitive. For example, the search engine treats the following queries as identical:

sustainable development
SUSTAINABLE DEVELOPMENT

Phrases

The search engine automatically ANDs terms together. For example, the following query finds all documents that contain "sustainable" and "development".

sustainable development

To search for a phrase with multiple terms together, add double quotes around the phrase. For example, to search for "sustainable development" as a complete phrase, enter the following:

"sustainable development"

Boolean operators

You can use the AND, NOT, and OR boolean operators. The "AND" operator (must be upper-case) matches documents where both terms exist in the document. The following query finds all documents that contain "sustainable development" and "animals":

"sustainable development" AND animals

The "OR" operator (must be upper-case) matches documents where at least one of terms exists in the document. The "OR" operator is the default operator for multi-term queries. The following query finds all documents that contain "sustainable development" or "animals":

"sustainable development" OR animals

The "NOT" operator excludes documents that contain the subsequent term. The following query finds all documents that contain "sustainable development" but do not contain "animals":

"sustainable development" NOT  animals

Fielded searches

The search engine enables you to search by fields in the search index. Following are the available fields for searching:

title
date
creator
subject
coverage
description

(The "coverage" field corresponds to location.)

To create a fielded search query, use the name of the field, followed by a colon, and then the term. The following query finds all documents that have "Sustainable" in the title field:

title:Sustainable

The following query finds all documents that have the phrase "Sustainable development" in the title field and children anywheter in the document:

title:"sustainable development" AND animals

Date ranges

You can limit the documents returns by the document's photo date. Following is the syntax

date:[yyyymmdd TO yyyymmdd]

The following query returns all documents from 1 January 2008 to 16 October 2009:

date:[20080101 TO 20091016]

The following query returns all documents containing the phrase "Sustainable development" that have a date of 1 January 2008 to 16 October 2009:

"sustainable development" AND date:[20080101 TO 20091016]

Wildcards

Wildcards are supported for single terms but not for phrases. You can use a question mark for a single character or an asterik for multiple characters. The following query returns documents that contain "text" or "test".

te?t

The following query returns all documents that contain a term that starts with "d" and ends with "t":

d*t

You cannot use the wildcard character as the first character in the query, except when listing all of the documents in the search index:

*

Stemming

The search engine performs stemming (converting terms to base word forms) automatically. For example, the following query will return documents that contain the terms "develop", "developed", "development", "develops", and so forth:

develop