This extension defines a simple mechanism for plugins to map URIs to and from integers. This is usually used for performance reasons, for example for processing events with URI types in real-time audio code). Typically, plugins map URIs to integers for things they "understand" at instantiation time, and store those values for use in the audio thread without doing any string comparison. This allows for the extensibility of RDF but with the performance of integers.
This extension is intended as an improved and simplified replacement for the
uri-map extension, since the map context parameter there has
proven problematic. This extension is functionally equivalent to the uri-map
extension with a NULL context. New implementations are encouraged to use this
extension for URI mapping.
Index
Instances
unmap
Instance| Label | unmap |
|---|---|
| Type | lv2:Feature |
A feature to unmap URIDs back to strings.
To support this feature, the host must pass an LV2_Feature to LV2_Descriptor::instantiate() with URI LV2_URID__unmap and data pointed to an instance of LV2_URID_Unmap.
A feature to map URI strings to integer URIDs.
To support this feature, the host must pass an LV2_Feature to LV2_Descriptor::instantiate() with URI LV2_URID__map and data pointed to an instance of LV2_URID_Map.