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What Is Involved in Document Retrieval
Document retrieval becomes an issue when the volume of documents is large. In the case of business documents, huge volumes are typical.
Locating a particular document and retrieving it from among the mass of documents then becomes a document management issue. In this article, we examine how this issue is handled.
Elements of a Document Retrieval System
The three key elements of a document retrieval system are 1. A Document Store: Documents must be stored safely so that they could be retrieved whenever needed. These days, documents are typically stored in computer databases.
2. A Classification System To facilitate later retrieval, the mass of documents must be organized in a meaningful manner that is easy to work with and understand. There would then be an index or catalog that could be referenced for locating the particular document to be retrieved.
3. Retrieval Request Communication The person who needs a document must specify the request in a manner that facilitates retrieval. In the case of computer databases, you could even specify a few relevant words and then ask the system to locate documents containing those words. An interface must be provided to input this request.
An internet search engine is a good example of a document retrieval system. The documents in this case often involve not only traditional Web pages but also items such as books, maps and images.
What Is Involved in Document Retrieval
Retrieving a document typically involves
Making Your Request: You might ask your secretary to find that letter you sent to Mr. Somebody last month. Or you might enter the unique words that letter might contain and ask your Email program with a search function to find that letter.
Matching Your Query With Documents The secretary might ask you whether it was the letter sent in the first week or third week that you want. The Email program might bring up a list of mails containing the words you specified. What is involved here is an attempt to match your query with the document. You might have to refine the query by specifying additional criteria before you get exactly what you want if it exists.
Ranking the Documents in Order of Relevance Unlike your secretary, databases could not ask for further clarifications to identify exactly which document you want. Instead, they list all the documents in their index that match your query in some way. It would then become necessary to rank these documents in an order of relevance. Search engines have algorithms to assess the relevance of documents to particular queries and then display them in that order.
Until sometime ago, search applications were normal only on the Internet. These days, such applications are available even for standalone desktops, not to mention your business intranet.
With the help of these applications, you could find what you want, without bothering your secretary. The speed of getting the document you want has become incomparably faster.
Structured Querying
Structured querying could help the process of document retrieval to be both faster and more meaningful.
An Email program with search facilities is a good example of structured querying. You could specify name of sender or recipient and date range, in addition to or in place of specific words in the content of the mail. In the case of general searches also, you could narrow down your search by refining your search.
About the Author
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