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Simple Query Interface (SQI)

Simple Query Interface (SQI). David Massart, EUN. S imple Q uery I nterface (SQI). Standard API (CWA - 15454, Nov. 2005) For combining highly heterogeneous metadata repositories Neutral in terms of query languages and results format Supports synchronous and asynchronous query mode

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Simple Query Interface (SQI)

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  1. Simple Query Interface (SQI) David Massart, EUN

  2. Simple Query Interface (SQI) • Standard API (CWA - 15454, Nov. 2005) • For combining highly heterogeneous metadata repositories • Neutral in terms of query languages and results format • Supports synchronous and asynchronous query mode • Based on a session management concept

  3. The SQI Application Program Interface

  4. Asynchronous Query Interface • asynchronousQuery • setSourceLocation • queryResultsListener • Session Management • createSession • createAnonymousSession • destroySession SQI Methods • Query Configuration • setQueryLanguage • setResultsFormat • setMaxQueryResults • setMaxDuration • Synchronous Query Interface • setResultsSetSize • synchronousQuery • getTotalResultsCount

  5. Fault Mechanism • Intentionally unsophisticated • Simplicity rather than richness • Only one fault: SQIFault • Thrown by all methods • Allows: • Free-text messages • Predefined error codes

  6. SQI Error Codes

  7. SQI Error Codes (cont.)

  8. LRE Results XML Header <?xml version="1.0" encoding="UTF-8"?> <strictLomResults xmlns=http://fire.eun.org/xsd/strictLreResults-1.0 xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance xsi:schemaLocation="http://fire.eun.org/xsd/strictLreResults-1.0 http://fire.eun.org/xsd/strictLreResults-1.0.xsd"> <lom xmlns="http://ltsc.ieee.org/xsd/LOM">...</lom> <lom xmlns="http://ltsc.ieee.org/xsd/LOM">...</lom> </strictLomResults>

  9. Querying the LRE • http://wiki.eun.org/lre-dev-guide/index.php/Main_Page

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