Though the initial versions of the XML specification inherited DTDs from SGML, later versions of the specification introduced the use of schemas to define the structure of XML data.
This dislocation cell structure is inherited by martensite, restricts the growing of the martensite and refines the structure so as to strengthen and toughen the magnetic field quenched materials.
Just like does not have the DNA double helix structure discovery, has not inherited the transmission transmission the central dogma, also does not have today's molecular biology.