Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.history / src-isv / concepts.mediawiki

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+=Concepts=\r
+{| border="1" cellpadding="5" cellspacing="0" align="center"\r
+|-\r
+! style="background: #efefef;" | Name !! style="background: #efefef;" |Description\r
+|-\r
+| HistoryManager || Manages a collection of items. \r
+|-\r
+| (History) Item || An item of HistoryManager is ''a time-series'' collection of samples; a file or memory array. It's random-accessable, streamable and appendable. \r
+|-\r
+| Sample || An entry in history item. It's a record that contains time and value, possibly other fields too.\r
+|-\r
+| (Sample)Format || The record type description of a sample.\r
+|-\r
+| Collector || Utility that samples a value from data source and writes to history items according to its configuration.\r
+|-\r
+| SamplingFormat (class) || Named description how a datasource's item is to be sampled by a collector. Used for Trend's history subscriptions.\r
+|-\r
+| Datasource || An information system that has variables. Provides values to Collector utility.\r
+|-\r
+| Variable || A variable in a datasource.\r
+|}\r