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Convention
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Description
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lowercase
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Lowercase words are source language elements that are not SQL keywords.
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Large brackets indicate the items within them are optional.
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[ ]
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Small brackets are part of ABL.
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Large braces indicate the items within them are required. They are used to simplify complex syntax diagrams.
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{ }
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Small braces are part of ABL. For example, a called external procedure must use braces when referencing arguments passed by a calling procedure.
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A vertical bar indicates a choice.
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Ellipses indicate repetition: you can choose one or more of the preceding items.
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