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_ (string continuation)
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Syntax
string-part _ string-part
The _ character is used to concatenate two or more string parts into a single string. Note that the maximum length of an OmniMark string is 2,048 characters, excluding the surrounding quotation marks and any underscores used to enter long strings.
The _ character must be used when joining quoted SGML or XML names. It is also useful when a string exceeds a single line in length.
Unlike the underscore keyword, the || keyword is a run-time concatenator allowing returned values, rather than only strings, to be joined. This makes the || keyword more flexible than the underscore, so the underscore should be used only in the cases noted above.
