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====== Introduction To Information Retrieval ======
Authors: Christopher D. Manning, Prabhakar Raghavan, Hinrich Schutze


===== Chapter 10 - XML Retrieval =====
//Page 178//

  * Relational databases involve searching structured data
  * Information retrieval (IR) is the searching of unstructured "raw" text without markup, or tagging
  * Table 10.1 summarizes differences in searching structured data vs. unstructured data
    * XQUERY - Page 197 - good candidate to be the standard for structured queries
  * structured data can be represented as structured documents searched with structured retrieval - good for searching "digital libraries, patent databases, blogs, text with persons and entities tagged.... and files from office suites saving as marked up text"
    * Structured queries work well for questions that dont work well with unranked retrieval
      * Boolean queries return lots of results without ranking the most relevant first
      * users may not be aware of which elements are structured and can be used in queries (example: country:Vatican)