News participation at MTSR16

2016-12-12 participation @ MTSR16

From 22nd to 25th OF November 2016, the 10th International Conference on Metadata and Semantics Research (MTSR, URL: took place at Goettingen, Germany. was there. Sponsoring the event and presenting a poster paper, under the title “Reasonable Graph: A Knowledge Repositories Management Framework”. Gongrats to the organizers and participants for a successful and highly interesting conference. Looking forward to next year's event.

2016-12-12 Kickoff of, thinking ontologies

We proudly announce the kickoff of the public presence of the opensource project


github repository:

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twitter: is a generic web solution of the management of digital and physical collections (ideally suited for libraries, archives, museums and all kinds of content). It manages generic ontologies, domain specific or standard ones (i.e. FRBR-FRAD-FRSAD, BIBFRAME, FRBR-OO, etc).

Please get in contact with us at email:


Open Source
RG platform is delivered as an open-source project under the GPL licence
Our inclusive approach meets the needs of the print-disabled community. The search (OPAC) and digital item retrieval modules meet the W3C Web Accessibility Guidelines 2.0 level AAA.
Graph Representation
Data are modelled as a graph. Best suite for semantic data natively modelled as such. Flexible schema and ontology management. Entities represented as nodes encapsulating properties in a tree structure
Graph Engine
Generic and efficient management of graph data. Ability to specify and handle specific subgraph for each specific application entity and for each procedure. Optimization of memory utilization.
Powerful inference engine for manipulating and inferring on the graph data. Fully customisable to each specific data and application domain. Handles data export to other logically equivalent data schemas and ontologies.
Full Text Search functionality provided through the FTS module based on Apache Solr

How it works

Reasonable Graph Opac demo
Reasonable Graph Admin edit demo

Get Started

If you already have scrolled through our site and feel ready, you can get started with one of the following ontologies on reasonable graph


or grab the code from the github project:


Kostas Maistrelis

Lead developer

Simos Leonidakos


Pantelis Brattis

Librarian, Consultant

Vasilis Spyropoulos


Thanos Kyritsis


Nikos Papazis


Konstantinos Daskalopoulos

Front End Web Developer

Nasos Anagnostopoulos

Web Developer

Contact us

We'll get back to you asap