In biology, cell theory is a scientific theory which describes the properties of cells. These cells are the basic unit of structure in all organisms and also the basic unit of reproduction.
The doctype declaration should be the very first thing in an HTML document, before the <html> tag. The doctype declaration is not an HTML tag; it is an instruction to the web browser about what version of the markup language the page is written in. The doctype declaration refers to a Document Type Definition (DTD).
Having made the link, SDO needs a bit of help from the schema author to know what kind of value to expect the non-containment link to resolve to and so the target attribute is qualified by an sdoxml:propertyType attribute to indicate that any referenced objects will be the type Person. 1 | 2 | 3 NEXT PAGE 1  Â». Related.