@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 rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . @prefix xsd: <http://www.w3.org/2001/XMLSchema#> . <http://lv2plug.in/ns/ext/log> a lv2:Specification ; rdfs:seeAlso <log.h> , <../../meta/meta.ttl> ; doap:name "LV2 Log" ; doap:shortdesc "A feature for writing log messages." ; doap:created "2012-01-12" ; doap:developer <http://drobilla.net/drobilla#me> ; lv2:documentation """ <p>This extension defines a feature, log:log, which allows plugins to print log messages with an API much like the standard C printf functions. This allows, for example, plugin logs to be nicely presented to the user in a graphical user interface.</p> <p>Different log <q>levels</q> (e.g. <q>error</q> or <q>information</q>) are defined by URI and passed as an LV2_URID. Thus, the possible number of log levels is unlimited, but implementations SHOULD use the levels defined in this extension unless they have a special reason to do otherwise.</p> """ . log:Entry a rdfs:Class ; lv2:documentation """ <p>A log entry. Subclasses of this class can be passed to LV2_Log_Log methods to describe the nature of the log message.</p>""" . log:Error a rdfs:Class ; rdfs:subClassOf log:Entry ; rdfs:comment "An error" . log:Note a rdfs:Class ; rdfs:subClassOf log:Entry ; rdfs:comment "An informative message" . log:Warning a rdfs:Class ; rdfs:subClassOf log:Entry ; rdfs:comment "A warning" . log:Trace a rdfs:Class ; rdfs:subClassOf log:Entry ; lv2:documentation """ <p>A debugging trace. These entries should not be displayed during normal operation, but the host may implement an option to display them for debugging purposes.</p> <p>This entry type is special in that it may be written to in a real-time thread. It is assumed that if debug tracing is enabled, real-time considerations are not a concern.</p> """ . log:log a lv2:Feature ; lv2:documentation """ <p>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.</p> """ .