/usr/lib/lv2/log.lv2/log.ttl is in lv2-dev 1.14.0~dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 | @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> ,
<lv2-log.doap.ttl> ;
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 levels (e.g. <q>error</q> or <q>information</q>) are defined
by URI and passed as an LV2_URID. This document defines the typical levels
which should be sufficient, but implementations may define and use additional
levels to suit their needs.</p>
""" .
log:Entry
a rdfs:Class ;
rdfs:label "Log Entry" ;
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:label "Error" ;
rdfs:subClassOf log:Entry ;
rdfs:comment "An error message." .
log:Note
a rdfs:Class ;
rdfs:label "Note" ;
rdfs:subClassOf log:Entry ;
rdfs:comment "An informative message." .
log:Warning
a rdfs:Class ;
rdfs:label "Warning" ;
rdfs:subClassOf log:Entry ;
rdfs:comment "A warning message." .
log:Trace
a rdfs:Class ;
rdfs:label "Trace" ;
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>
""" .
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