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Free and open source OLAP engine written in Java Olap Mapper is an OLAP engine written in Java. Olap Mapper enables you to interactively analyze large datasets that are stored in SQL databases without writing SQL queries. An Olap query consists of a classifier, a measure and an aggregation operation. The user chooses the classifier, the measure and the operation by clicking directly on the visualization of a dimensional schema. User choices are then passed to the OLAPmapper for building an SQL query. The query result is returned to the user in the form of a relational table.The Graph A graph is, not surprisingly, denoted by a graph element. Nested inside a graph element are the declarations of nodes and edges. A node is declared with a node element, and an edge with an edge element.Declaring a GraphIn compare with standard GraphML, all edges are directed in our file. An identifier for the graph has to be specified with the XML Attribute id. The identifier is used, when it is necessary to reference the graph.Declaring a NodeNodes in the graph are declared by the node element. Each node has an identifier, which must be unique within the entire document, i.e., in a document there must be no two nodes with the same identifier. The identifier of a node is defined by the XML-Attribute id.Declaring an EdgeEdges in the graph are declared by the edge element. Each edge must define its two endpoints with the XML-Attributes source and target. If the value of the source, resp. target, must be the identifier of a node in the same document.Optionally, you can specify an identifier for the edge with the XML Attribute id. The id XML-Attribute is used, when it's necessary to reference the edge. Requirements: · Java 1.5 or later · Database What's New in This Release: · several updates · change of settings is possible from menu now · help · more universal VERD 3D visualization · documentation

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