Long Term Ecological Research Network Information System LTER Metacat Advanced Query Interface LTER Information Manager’s Meeting Montreal, Canada 4-7 August 2005 Mark Servilla (LNO)

LTER Network Information System2 Goals & Products Initial design IM Meeting, Portland Supported under the LTER NISAC More expressive queries to Metacat Interface provides –Simple query form –Advanced query form Subject Author Spatial Taxonomic –Simple “browse catalog” (KNB like)

LTER Network Information System3 Goals & Products cont. Decouple from Metacat to enhance portability –Runs as a separate web application (as a servlet in a Tomcat container) Utilize standard patterns and designs – Apache Struts MVC design Parameterized for site-specific skins (in progress)

LTER Network Information System4 Metacat Notes Performance issues are being addressed by metacat-dev –Separate active versus deprecated xml_nodes –Generate database indices for key columns –DBA configurable indices –Enhance xml_node query syntax –Improve host hardware configuration/recommendations (e.g., up memory, clustering, etc…)

LTER Network Information System5 Architecture Windows/Linux/Unix Java Jakarta Tomcat 5 Metacat 1.5 LTER Query Interface Apache Struts Metacat Database prairie.lternet.edu

LTER Network Information System6 Architecture “X” Windows/Linux/Unix Java Jakarta Tomcat 5 LTER Query Interface Apache Struts Metacat 1.5 Windows/Linux/Unix Java Jakarta Tomcat 5 Metacat Database prairie.lternet.edu server.X.edu

LTER Network Information System7 Architecture “X-Y” Windows/Linux/Unix Java Jakarta Tomcat 5 LTER Query Interface Apache Struts Metacat 1.5 Windows/Linux/Unix Java Jakarta Tomcat 5 Metacat Database prairie.lternet.edu server.X.edu server.Y.edu

LTER Network Information System8 LTER Custom Unit Registry Demonstration