Specifies if a value is required for a metadata field.
When set to TRUE, the metadata field is required.
When set to FALSE, the metadata field is optional.
Returns TRUE if the metadata field is required.
Returns FALSE if the metadata field is optional.
Defines the dDocTitle metadata field as a required field:
<$fieldName = "dDocTitle", fieldCaption = lc("wwTitle"), isRequired = 1, fieldType = "BigText", requiredMsg = lc("wwSpecifyTitle")$>