When creating a Meta data field element, the data, which the element does work on/with, is the item_metafield_value.value table and column.
For most scenarios, this is sufficient. However, a meta data field has much more information associated with it, eg. the meta field's label. If the label, instead of the value, is what is needed, then the field "item_metafield_label_label" can be added to the element. An addition of such a field changes the data from item_metafield_value.value to item_metafield_label.label. NB! Be aware that labels may have different values depending on the selected language.
There are 26 different fields.
value
The default value of a field, ie this is the value of a meta data field element's field if a field is not specified by the user.
Limited to 4000 chars.
smallValue
Holds the same value as value, but limited to 200 chars.
item_metafield_valueid
The primary key for the item_metafield_value table.
optionvalue
prevref
item_tree_valueid
item_combo_valueid
rowid
sortindex
item_metafield_item_datatypeid
item_metafield_label_is_public
item_metafield_label_sortindex
item_metafield_label_label
item_metafield_label_defaultvalue
item_metafield_label_nm_function
item_metafield_label_nm_search
item_metafield_label_nm_search_sortindex
item_metafield_label_manifest
item_metafield_label_errormessage
item_metafield_label_item_metafield_validationid
item_metafield_label_culture
metafieldid
ItemReferenceTitle
ItemReferenceBaseID
StandardGuid
ItemGuid