id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
iassist-649	Jaaskelainen, Taina; Moschner, Meinhard; Wackerow, Joachim	Controlled Vocabularies for DDI 3: Enhancing Machine-Actionability	2010	6	.pdf	application/pdf	3453	188	48	Therefore, we fully expect that the definitions provided for the terms in DDI vocabularies will be an advantage both to metadata production and information retrieval. Controlled vocabularies play a critical role in metadata standards, which have two basic components: 1) semantics – definition of the meaning of metadata elements, and 2) content – declaration of instructions for what and how values should be assigned to elements (Chan and Zeng, 2006).	cache/iassist-649.pdf	txt/iassist-649.txt