[□=□] □
[tag=□] □
[lemma=□] □
However , if you want to make the retrieval efficient , you 'll have to resort to the means your RDBMS provider gives you - be it an index , my imaginary MEMSTORE command , or an intelligent RDBMS which creates indices without your knowledge based on the fact that you have sent it many queries based on a specific combination of keys ... Economic depreciation also requires indexing allowances for inflation . The subclasses of this class support 3 mapping schemes : the regular mapping means the storage of entries in a container regularly when the distance between any two neighbor vector entries is constant ; the reference mapping provides an arbitrary mapping of vector entries to the container via a reference vector that contains indices of vector entries in the container ; and the component reference mapping corresponds to the cutting a component out of a set of vectors mapped via reference vector ( see the package description for more details ) . Includes indexes . An example of this is indexing images by their color distribution . However , it is important for all researchers to note that until Google Scholar gives a full account of what material it is indexing and how often that index is updated , it cannot be considered a true scholarly resource in the sense that Web of Science and Scopus are .