Chameleon schema that provides various fundamental type definitions for inclusion in other Zelestra Standards schemas. Two or three dimensional attractor value. The Z axis may be considered as zero or ignored as needed. Must use only XHTML-Strict markup tags (a, em, li, p, strong, and ul). List of two double values. List of two float values. List of three double values. List of three float values. List of four double values. List of four float values.