General <REFMAT> rules and examples

Rules

<REFMAT> on a key field means that all values are selected for determining the data for this field. At least one key field must be used with value <REFMAT> to activate this mechanism.
<REFMAT> on a field for setting values must always be used together with target field *. All data from the selected records according the key fields are used.
<REFMAT> without parameters and <REFMAT (...)> with parameters can be used mixed.
<REFMAT (...)> with parameters or any other special values are applied according to their description.

The different views are partially related. This applies in particular if no view control is specified and therefore the view control of the reference is transferred. Examples:
Sales views MVKE always also require the control data MLAN
The accounting views of the plants (MARC) require valuation MBEW
Creating different views (MRP, Purchasing, and so on) requires data for these views in the basic material data MARA. These data can be provided with the following sentence:

In this case, the option "Only if initial" must be selected, otherwise MARA data that has been entered can be overwritten.

It is generally recommended always to use the option "Only when initial" for sentences with field * <REFMAT>.

These two lines of definition would copy all fields of all plant views of the reference material.

However, the access key can also be used in a mixed way:

These settings would copy all the fields for all distribution channels in sales organization 0001.