This is an indication on the format of the value. bit: 1-bit or more (vector) bits unsigned integer, byte: 8-bit signed integer, shortint: 16-bit signed integer, int: 32-bit signed integer, longint: 64-bit signed integer, shortreal: 32-bit signed floating point number, real: 64-bit signed floating point number, string: textual information. This is an indication of the signedness of the value. Indicates legal units for delay values. Contains the xml:id attribute used for annotating elements with a unique identifiers. See http://www.w3.org/TR/xml-id for more information. Choices used by elements with an attribute ipxact:choiceRef. Non-empty set of legal values for a elements with an attribute ipxact:choiceRef. Choice key, available for reference by the ipxact:choiceRef attribute. One possible value of ipxact:choice When specified, displayed in place of the ipxact:enumeration value Text that may be displayed if the user requests help about the meaning of an element