How narrow or broad to make it is best decided when considering concrete search scenarios. #Apache lucene query syntax fullWhen deciding which approach to use, you should consider which parts of your document will be of interest as context for full text query. Be aware that, according to the documentation, this feature is "subject to change". This can be seen as a shortcut to establishing an index on all elements below. If you define an index on a node path, as above with, the node structure below is maintained in the index and you can still query descendant nodes, such as or. If you want to be able to query descendant nodes, you should set up additional indexes on these, such as or. for or, since such nodes have all been collapsed. With such an index, one cannot search for the nodes below, e.g. What is passed to Lucene is the string value of, which includes the text of all its descendant text nodes. If you define an index on a qname, such as, an index is created on alone. You can either define a Lucene index on a single element or attribute name (qname=".") or on a node path (match="."). the legacy full text index's &=, |=, near(), text:match-all(), text:match-any()). Although the legacy full text index is not needed for Lucene-based search, we have explicitly enabled it here for this example configuration in order to point out the expressive similarities between the Lucene and legacy search functions/operators (i.e.You can do this either by using the eXist Java-based admin client, selecting the test collection and choosing "Reindex collection", or by using the xmldb:reindex() function, supplying xmldb:reindex('/db/test') in eXide or in the XQuery Sandbox. #Apache lucene query syntax updateAfter you create or update this index configuration file, you will need to reindex the data.Index configuration files are always saved in a directory structure inside system/config/db which is isomorphic to the directory structure of db. If your test data are saved in db/test, you should save collection.xconf in db/system/config/db/test.Lucene Query Parser Syntax Sample XML File #Apache lucene query syntax how toThe following is the eXist documentation on how to use Lucene:ĮXist supports the full Lucene Query Parser Syntax (with the exception of "fielded search"): This means your searches will have higher Precision and Recall than search systems that do not retain document structure.ĮXist and Lucene Documentation This means that a search hit retrieving a document title in a large number of documents will have a higher probability of being ranked first in your search results. So, for example, a match of a keyword within a title can have a higher score than a match in the body of a document. This means that you can customize to a very high degree the search weight of keyword matches to every node in your document. This node-id is used as the Lucene document ID in the Lucene index files, that is, each XML node becomes a Lucene document. It will also be the basis for an implementation of the W3C's full text extensions for XQuery.ĮXist associates a distinct node-id with each node in an XML document. The new Lucene full text search framework is faster, more configurable, and more feature-rich than eXist's legacy full text index. The Apache Lucene full text search framework was added to eXist 1.4 as a full text index, replacing the previous native full text index. This is done using the Lucene index extensions to eXist. You want to perform a full text keyword search on one or more XML documents.
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