An expression language is a language for creating a computer-interpretable representation of specific knowledge and may refer to:
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Advanced Boolean Expression Language, an obsolete hardware description language for hardware descriptions
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Data Analysis Expressions (DAX), an expression language developed by Microsoft and used in Power Pivot, among other places
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Jakarta Expression Language, a domain-specific language used in Jakarta EE web applications. Formerly known as "Unified Expression Language", "Expression Language" or just "the Expression Language").
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Rights Expression Languages, machine processable language used for representing immaterial rights such as copyright and license information
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