Because annotation types are compiled and stored in byte code files just like classes, the annotations returned by these methods can be queried just like any regular Java object.

Each annotation has a reference number and the nature of the information it contains is conveyed by the annotation type.

This annotation type is used to denote the effect when the meaning, scope or application of an Act or provision etc. is changed in some way, but without there being any authority to alter the text.

This annotation type contains information about the geographic extent of the Act or relevant part of it.

This annotation type is used for amendments, including repeals, where there is authority to change the text.

This annotation type is so called because it used to appear in the margin of the Queen's Printer's copy of primary legislation.

At present, the P-note annotation type is used only in respect of the making of commencement orders (distinguished by a 'C' series number after the number of the instrument) or other exercises of a power to appoint a day.

The X-note annotation type is used sparingly to alert users to anything they may need to be aware of in using the text.

Java has a set of predefined annotation types, but it is allowed to define new ones.

Annotations are categorised by annotation type, such as F-notes for textual amendments and I-notes for commencement information (a full list can be found in the Editorial Practice Guide).