An introduction to the XML Document Type Definition. What XML building blocks are defined in a DTD. How to define the elements of an XML document using DTD. How to define the legal attributes of XML elements using DTD. How to define XML entities using DTD. How to test for DTD errors while loading XML documents. Some DTD examples.
19 Jul, 2012 what is 0. The Basement membrane is a layer of fiber that is located under epithelium or endothelium. The epithelium is the tissue that lines the surfaces and cavities of organs, whereas the endothelium lines the inside of blood vessels.
Ribosomes are found in two locations in the cell. Free ribosomes are present in the cytosol, the watery fluid inside the cell and are not attached to any other structure. Membrane-bound ribosomes are attached to a structure known as rough endoplasmic reticulum.