DownValues::vrule UpValues::vrule OwnValues::vrule FormatValues::vrule DefaultValues::vrule NValues::vrule Messages::vrule SubValues::vrule

Details

This message is generated when the right-hand side of an assignment to the values of a symbol includes an element that is not a rule.
This message is generated only by direct assignments to the values of a symbol.
Definitions are usually added using ordinary assignments, rather than using direct assignments to the values of a symbol.
Values stored in the internal structure of a symbol are represented using lists of rules.
Off[message] switches off the message; On[message] switches it on. For example: Off[DownValues::vrule].

Examples

The element on the right-hand side of the assignment is not a rule:

Wolfram Language code: Messages[fsym] = {"text of message"}

This shows a valid assignment for the messages of a symbol:

Wolfram Language code: Messages[fsym] = {HoldPattern[fsym::tag] :> "text of message"}

The same message can be introduced using an ordinary assignment:

Wolfram Language code: fsym::tag = "text of message"

This shows the message that was introduced by the assignment:

Wolfram Language code: Messages[fsym]

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