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.
For example in the skin, the basement membrane keeps the layers of the skin attached to one another. The basement membrane also provides a barrier between the tissue that lines the surface of organs and the internal tissues.It is able to prevent foreign materials and malignant (tumor or cancer) cells from penetrating the deeper tissues.or example in the skin, the basement membrane keeps the layers of the skin attached to one another. The basement membrane also provides a barrier between the tissue that lines the surface of organs and the internal tissues.