## Element Customisation

This form can be used to add, modify or delete elements from the system, as this form is directly linked to the element lookup table. Each entry in that table consists of four parts, each of which must contain data or be selected:

Element
This is an abbreviation that allows for rapid data recording of that element. If a new element is being added, only unused abbreviations can be selected (of up to 20 characters in length).

Element Output
This is a description of the element, up to 40 characters in length.

Quantification Code
The Quantification Code (QC) of an element is a measure of its zooarchaeological value. For a further discussion on the use of QCs in The York System, see the Quantification Codes page, or one of the following lists:

- mammal QCs
- bird QCs
- fish QCs
- other QCs

Classes
Some elements are shared between more than one class of animal. Although in most cases, any additions will only apply to one class, certain combinations of classes can be entered into the system. Permitted combinations are:

- mammal and bird
- mammal and other
- bird and other
- fish and other
- mammal, bird and other
- mammal, bird, fish and other

Any other combinations will result in an error message.

The Add button can be pressed when values have been entered into the three fields and at least one class has been selected. If the user wishes to delete an element, it must be selected from the list before pushing the Delete button.