Specifies the internal name of a metadata field.
Predefined metadata fields begin with a lowercase d (for example, dDocName).
Custom metadata fields begin with a lowercase x (for example, xComments).
Returns the name of the metadata field as a string.
Defines the dDocTitle metadata field:
<$fieldName = "dDocTitle", fieldCaption = lc("wwTitle"), isRequired = 1, fieldType = "BigText", requiredMsg = lc("wwSpecifyTitle")$>