= Architecture Specification =

== Peregrine API ==

The collaboration between interfaces and some of implementation packages are displayed on this diagram ('''Be aware that some parts of this diagram are outdated and subject to change soon'''):

[[Image(Peregrine_API_Diagram.png, 800px)]]

== Ontology backends ==

Comparison of ontology interface implementations

 || Features || DBOntologyImpl || !SingleFileOntologyImpl || !FileFlyweightProcessingOntologyImpl || !CompoundOntologyImpl ||
 ||Is modifiable ontology           || + || – || – || + ||
 ||Is flyweight processing ontology || + || + || + || - ||
 ||Can handle UTF-8 data            || + || + || + || depends on underlying ||
 ||Can read compressed data         || not relevant || - || + || depends on underlying ||
 || Needs additional memory         || – || + || – || – ||

Diagram below illustrates the flow of modifying ontology.

[[Image(Peregrine_Add_Remove_Concept_Sequence_Diagram.png, 800px)]]

== Peregrine Subprojects & Packaging ==

[[Image(Peregrine_Packaging_Diagram.png, 800px)]]

== Peregrine Application Layers ==

[[Image(Peregrine_Application_Layers.png, 600px)]]