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Boolean searching (AND, OR, NOT)

Boolean searching allows you to combine search terms using the three Boolean operators AND, OR and NOT. To execute a Boolean search, enter the required terms separated by the Boolean operators you wish to use.

When you transfer more than one search term from a browse index to a search box, The Nineteenth Century automatically combines them using the Boolean operator OR.

AND

The AND operator retrieves all entries that contain all of the terms entered. This normally retrieves fewer entries than searching one of the terms on its own.

For example: All Record Keyword: science AND religion

If you wish to search for the word 'and' in a phrase (and therefore do not want it to be a Boolean operator) you should type the phrase into the search box and enclose it in double quotes. For example "science and religion" will find the whole phrase 'science and religion'.

OR

The OR operator retrieves all entries which contain one or more of the terms entered. This retrieves more entries than searching one of the terms on its own.

For example: All Record Keyword: books OR printing

If you wish to search for the word 'or' in a phrase (and therefore do not want it to be a Boolean operator) you should type the phrase into the search box and enclose it in double quotes. For example: "books or printing" will find the whole phrase 'books or printing'.

NOT

The NOT operator retrieves all entries that contain the first term entered but not the second.

For example: All Record Keyword: art NOT sculpture

If you wish to search for the word 'not' in a phrase (and therefore do not want it to be a Boolean operator) you should type the phrase into the search box and enclose it in double quotes. For example: "art not sculpture" will find the whole phrase 'art not sculpture'.


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