One value of a collection item: a text string, a date string or a number, with the prefix of a subitem.
public sealed class PdfCollectionItemValue
ISO 32000-2 §7.11.6, Tables 46 and 47. The data type matches the schema field's subtype (§12.3.5, Table 155).
kind:method, kind:property, kind:ctor. Press Esc to clear.DateGets the value read as a date (§7.9.4) when it is a string that holds one, else null.NumberGets the value when it is a number, else null.PrefixGets the subitem's prefix (P), shown before the value and ignored when sorting, or null.TextGets the value decoded as text when it is a string, else null.