Adds a link to the design document

README.md

@@ -16,7 +16,9 @@ Its goal is to provide a compliant, safe, and fast graph database based on the [
 It is written in Rust.
 It also provides a set of utility functions for reading, writing, and processing RDF files.
 
-Oxigraph is in heavy development and SPARQL query evaluation has not been optimized yet. The development roadmap is using [GitHub milestones](https://github.com/oxigraph/oxigraph/milestones?direction=desc&sort=completeness&state=open).
+Oxigraph is in heavy development and SPARQL query evaluation has not been optimized yet.
+The development roadmap is using [GitHub milestones](https://github.com/oxigraph/oxigraph/milestones?direction=desc&sort=completeness&state=open).
+Oxigraph internal design [is described on the wiki](https://github.com/oxigraph/oxigraph/wiki/Architecture).
 
 It is split into multiple parts:
 * [The database written as a Rust library](https://crates.io/crates/oxigraph). Its source code is in the `lib` directory.

lib/README.md

@@ -24,7 +24,7 @@ Oxigraph implements the following specifications:
 * [Turtle](https://www.w3.org/TR/turtle/), [TriG](https://www.w3.org/TR/trig/), [N-Triples](https://www.w3.org/TR/n-triples/), [N-Quads](https://www.w3.org/TR/n-quads/), and [RDF XML](https://www.w3.org/TR/rdf-syntax-grammar/) RDF serialization formats for both data ingestion and retrieval using the [Rio library](https://github.com/oxigraph/rio).
 * [SPARQL Query Results XML Format](http://www.w3.org/TR/rdf-sparql-XMLres/), [SPARQL 1.1 Query Results JSON Format](https://www.w3.org/TR/sparql11-results-json/) and [SPARQL 1.1 Query Results CSV and TSV Formats](https://www.w3.org/TR/sparql11-results-csv-tsv/).
 
-A preliminary benchmark [is provided](../bench/README.md).
+A preliminary benchmark [is provided](../bench/README.md). Oxigraph internal design [is described on the wiki](https://github.com/oxigraph/oxigraph/wiki/Architecture).
 
 The main entry point of Oxigraph is the [`Store`](store::Store) struct:
 ```rust