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Searches and Indexes OpenCms comes with a built-in search engine. The Search Management screen is used to access tools that tune this search engine. The Search Management screen is divided into two sections. The top section, Index actions, is used to access tools for managing the search engine’s index files. The bottom section, Search Indexes, lists the existing indexes. There are two buttons in the Index actions section, New Index and View index Sources. Before explaining these tools, we will see briefly how searching works in OpenCms. The most efficient search engines read through a collection of data (such as a website or a group of documents) and create a special catalog of all of the words in the collection and which documents these words appear in. This catalog is called an index because it performs a similar task to the index in the back of a book it correlates a word to the locations where it appears. More advanced search engines, such as the one in OpenCms, store additional information such as how many times a word appears in a document and where in the document the word appears. The search engine can use this additional information to return an ordered list of documents with the best matches first. Once a search engine has an index, it can perform searches. When a request comes in for a new search, the search engine breaks down the terms in the search request, examines the indexes, and returns a list of matching documents.

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