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+@prefix dcs: <http://ontologi.es/doap-changeset#> .
+@prefix doap: <http://usefulinc.com/ns/doap#> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix log: <http://lv2plug.in/ns/ext/log#> .
+@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
+@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
+
+<http://lv2plug.in/ns/ext/log>
+ a doap:Project ;
+ doap:name "LV2 Log" ;
+ doap:shortdesc "A feature for writing log messages." ;
+ doap:created "2012-01-12" ;
+ doap:developer <http://drobilla.net/drobilla#me> ;
+ doap:release [
+ doap:revision "2.4" ;
+ doap:created "2016-07-30" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-1.14.0.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Add lv2_log_logger_set_map() for changing the URI map of an existing logger."
+ ]
+ ]
+ ] , [
+ doap:revision "2.2" ;
+ doap:created "2014-01-04" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-1.8.0.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Add missing include string.h to logger.h for memset."
+ ]
+ ]
+ ] , [
+ doap:revision "2.0" ;
+ doap:created "2013-01-08" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-1.4.0.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Add logger convenience API."
+ ]
+ ]
+ ] , [
+ doap:revision "1.0" ;
+ doap:created "2012-04-17" ;
+ doap:file-release <http://lv2plug.in/spec/lv2-1.0.0.tar.bz2> ;
+ dcs:blame <http://drobilla.net/drobilla#me> ;
+ dcs:changeset [
+ dcs:item [
+ rdfs:label "Initial release."
+ ]
+ ]
+ ] ;
+ lv2:documentation """
+
+This extension defines a feature, log:log, which allows plugins to print log
+messages with an API similar to the standard C `printf` function. This allows,
+for example, plugin logs to be nicely presented to the user in a graphical user
+interface.
+
+Different log levels are defined by URI and passed as an LV2_URID. This
+extensions defines standard levels which are expected to be understood by all
+implementations and should be sufficient in most cases, but advanced
+implementations may define and use additional levels to suit their needs.
+
+"""^^lv2:Markdown .
+
+log:Entry
+ a rdfs:Class ;
+ rdfs:label "Log Entry" ;
+ lv2:documentation """
+
+Subclasses of this are passed as the `type` parameter to LV2_Log_Log methods to
+describe the nature of the log entry.
+
+"""^^lv2:Markdown .
+
+log:Error
+ lv2:documentation """
+
+An error should only be posted when a serious unexpected error occurs, and
+should be actively shown to the user by the host.
+
+"""^^lv2:Markdown .
+
+log:Note
+ lv2:documentation """
+
+A note records some useful piece of information, but may be ignored. The host
+should provide passive access to note entries to the user.
+
+"""^^lv2:Markdown .
+
+log:Warning
+ lv2:documentation """
+
+A warning should be posted when an unexpected, but non-critical, error occurs.
+The host should provide passive access to warnings entries to the user, but may
+also choose to actively show them.
+
+"""^^lv2:Markdown .
+
+log:Trace
+ lv2:documentation """
+
+A trace should not be displayed during normal operation, but the host may
+implement an option to display them for debugging purposes.
+
+This entry type is special in that one may be posted in a real-time thread. It
+is assumed that if debug tracing is enabled, real-time performance is not a
+concern. However, the host MUST guarantee that posting a trace _is_ real-time
+safe if debug tracing is not enabled (for example, by simply ignoring the call
+as early as possible).
+
+"""^^lv2:Markdown .
+
+log:log
+ lv2:documentation """
+
+A feature which plugins may use to log messages. To support this feature,
+the host must pass an LV2_Feature to LV2_Descriptor::instantiate() with URI
+LV2_LOG__log and data pointed to an instance of LV2_Log_Log.
+
+"""^^lv2:Markdown .
+