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FYS: International Human Rights: Journal Articles (including biographical sources)

International Law

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Boolean Operators

Boolean Operators that can be used in HeinOnline:  AND, +, OR, -, NOT


If you use boolean operators they must be in ALL CAPS

Yes:    "political advertising" AND abortion

No:     "political advertising" and abortion


Description of the Boolean operators:

AND: The AND operator matches documents where both terms exist anywhere in the text of a single document

OR: The OR operator links two terms and finds a matching document if either of the terms exist in a document.

+ :   The "+" or required operator requires that the term after the "+" symbol exist somewhere in a field of a single document.

NOT: The NOT operator excludes documents that contain the term after NOT.

- :  The "-" or prohibit operator excludes documents that contain the term after the "-" symbol.