  We have developed an application aiming at federated search for EU and
Hungarian legislation and jurisdiction. It now contains above 1 million
documents, with daily updates. The database holds documents downloaded from the
EU sources EUR-Lex and Curia Online as well as public jurisdiction documents
from the Constitutional Court of Hungary and The National Office for The
Judiciary. The application is termed Justeus. Justeus provides comprehensible
search possibilities. Besides free text and metadata (dropdown list) searches,
it features hierarchical data structures (concept hierarchy trees) of directory
codes and classification as well as subject terms. Justeus collects all links
of a particular document to other documents (court judgements citing other case
law documents as well as legislation, national court decisions referring to EU
regulation etc.) as tables and directed graph networks. Choosing a document,
its relations to other documents are visualized in real time as a network.
Network graphs help in identifying key documents influencing or referred by
many other documents (legislative and/or jurisdictive) and sets of documents
predominantly referring to each other (citation networks).
