The statistics about cancer can be frightening: one in two men and one in three women are expected to develop cancer during their lifetime, not including skin cancer. While those are scary numbers, educating yourself about cancer raises the chance that you will find a cancer in the earlier more curable stages of the disease. That said, even if a cancer is not curable, it is almost always treatable, and both the treatments for, and survival from, cancer have been improving in recent years. More people are living—and thriving—with cancer than ever before.
Metadata schemata can be hierarchical in nature where relationships exist between metadata elements and elements are nested so that parent-child relationships exist between the elements. An example of a hierarchical metadata schema is the IEEE LOM schema, in which metadata elements may belong to a parent metadata element. Metadata schemata can also be one-dimensional, or linear, where each element is completely discrete from other elements and classified according to one dimension only. An example of a linear metadata schema is the Dublin Core schema, which is one dimensional. Metadata schemata are often two dimensional, or planar, where each element is completely discrete from other elements but classified according to two orthogonal dimensions.