The kind of data a collection schema field shows (Subtype).
public enum PdfCollectionFieldType
ISO 32000-2 §12.3.5, Table 155.
kind:method, kind:property, kind:ctor. Press Esc to clear.CompressedSizeThe length of the embedded file stream (CompressedSize, PDF 2.0).CreationDateThe embedded file's creation date (CreationDate).DateA date field from the collection item (D).DescriptionThe file specification's description (Desc).FileNameThe file name of the embedded file (F).ModificationDateThe embedded file's modification date (ModDate).NumberA number field from the collection item (N).SizeThe embedded file's size (Size).TextA text field from the collection item (S).