READ is a CAOS command for Catalogue access.


Syntax: READ tagname (string) offset (int)

Returns, as a string, the relevant field of the tagname tag in the catalogue. The first field has offset 0. tagname is case-sensitive.

Before querying with READ you should check the tag exists with REAQ tagname, and ensure that offset is in the range from 0 to (REAN tagname)-1. Otherwise the command fails with a Catalogue error.

If you are querying Agent Help it is preferable for most cases to use WILD instead of READ. This will provide fallback in case of undocumented agents.

Editnorn This article about a CAOS command or function needs further examples.

See also

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