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[Trend analysis](https://git.opendfki.de/reuschling/dynaq4solr/wikis/modules#trend-analysis)
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---
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http://earlytrendradarservice.kl.dfki.de/solr/etrCollection/clusteringSTC?q=%2BdynaqCategory:brandwatch+%2Btitle%3Ascreen+%2Btitle%3Anews+%2Bmodified%3A[20130301000000000+TO+20140201000000000]&rows=100&fl=&relevantTermsSummarizer=true&maxIntTerms=42&maxDocsPerCluster=50
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```
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---
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#### Contextualization ###
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The DynaQ module __ContextDocsSearchComponent__ gives the possibility to contextualize your queries with certain documents, describing the topic/context you want to search for. For example, you want to search inside the domain of fishes, and you have a huge index with pet forenames. You search for 'harry', and recieve birds, cats, and fishes. Beside to add a new search term 'fish', you can set one or more (possibly preconfigured) fish documents as context alternatively. The fishes named 'harry' will appear on the top of your result list. Or, if you doesn't specify 'harry' anymore, you will receive any fish documents in your corpus (fuzzy), performing a statistical document similarity search.
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http://earlytrendradarservice.kl.dfki.de/solr/etrCollection/dynaq?q=%2B%28dynaqCategory:brandwatch%29&contextDocIds=http://www.usatoday.com/story/news/nation/2013/02/14/drought-farmers-midwest/1920577/&contextDocsField=body&rows=10&fl=dataEntityId,title,creator,score
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```
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---
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### EmptyFlResponseCleaner ###
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Sometimes you don't want the default behaviour of Solr, that all attributes of a document should be loaded inside the response, if you doesn't specify anything on the fl parameter (&fl=). If you want to load nothing in this case, you can use the EmptyFlResponseCleaner module. It just strips all document attribute entries from the response before the server sends it back to the client.
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```
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### Document group summarizer ###
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It is sometimes too much time consuming to look inside one or more documents in order to know what their topics are. Sometimes a rough overview is enough. For this, there exists the module for document summarization. You specify one or more documents as a searching query. The summarizer gets the result list, looks into the documents and extracts characteristic terms out of it. The resulting list of buzzwords can be used as summarization.
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```
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### LastQueriesWarmer ###
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The LastQueriesWarmer module is a possibility to warm up your solr caches after a server restart. The module remembers the last frequently used queries and saves them at server shutdown under \<yourHomeDir\>/.dynaq4solr/warming. After starting the server, you can call them for cache warmup. For this, invoke the script ___\<zip\>/bin/cachewarming.sh___.
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```
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### Trend Analysis ###
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The DynaQ Solr modules offers a component for trendmining and forecasting. This module enables a higher abstracted view onto the corpus via trend mining analysis. The module gets a trend definition specified by a regular query, potentially contextualized by documents from the contextualization module. Further, certain parameters for the time range, that should be analyzed, are offered.
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