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-rw-r--r--lv2/log/log.meta.ttl75
1 files changed, 74 insertions, 1 deletions
diff --git a/lv2/log/log.meta.ttl b/lv2/log/log.meta.ttl
index 1a5a56e..87cff43 100644
--- a/lv2/log/log.meta.ttl
+++ b/lv2/log/log.meta.ttl
@@ -1,6 +1,8 @@
@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>
@@ -49,5 +51,76 @@
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 .