Collection Service 19 February 2001 CYCLADES Kick-off meeting

Collection Service 19 February 2001 CYCLADES Kick-off meeting

Collection ØA set of documents ØA set of services on the documents ØA set of polices that regulate the use of the services 19 February 2001 CYCLADES Kick-off meeting

Why a dynamic collection functionality? The Cyclades data environment will be huge and heterogeneous The dynamic collection functionality will provide Ø a user view of the data environment as organised into community meaningful information spaces accessible throught specific set of services 19 February 2001 CYCLADES Kick-off meeting

User View Collection names Collection descriptions Computer Science documents in “computer science” domain Recent Physics documents in “physics” domain stored in Ar. Xiv and Phys. Net, published after 1990 ……. 19 February 2001 ……. CYCLADES Kick-off meeting

User view simple-search Input: “keywords in the abstract” Operations Collection names Computer Science European Computer Science 19 February 2001 Preconditions: keywords in English simple-search, … Output: set of attribute-based search, Effect: ”returns the … cross-language search, specified output for all the documents that contains the given keywords in their abstract” CYCLADES Kick-off meeting

Why a dynamic collection functionality? The dynamic collection mechanism will provide Ø a support for the optimisation of the services 19 February 2001 CYCLADES Kick-off meeting

Architecture Create. coll(criterion) Remove. coll(coll. name) 19 February 2001 Collection Server List. collections Get. collection. description (coll. name) CYCLADES Kick-off meeting

ØList of available collections Collection server ØFor each collection: ØList of metadata repositories, indexes, … and üname, subject, description, signature their address of services, access polices and effect ØFor each metadata repository: üSubject, percentage accessible digital documents, language, …. . Collection metadata repositories and ØMapping betweendescriptive metadata indexes ØSearch, Browse specifications Ø Relation between collection and system …. descriptive metadata System descriptive metadata 19 February 2001 CYCLADES Kick-off meeting

Dynamic creation Ø Admissible criteria üThose documents and those services that are relevant for the new identified community 19 February 2001 CYCLADES Kick-off meeting

Dynamic creation • Admissible criteria - initial assumption Composition Selection of existing collections d d / (C 1, C 2, …, Cn) P(d) Restriction on the document metadata fields 19 February 2001 CYCLADES Kick-off meeting

“system driven” criterion formulation Ø The user interface presents the possible options and their description ü List of available collections and their description ü Composition operators ü Indexed metadata fields for the documents that belong to the chosen composition Ø Services and polices are automatically derived 19 February 2001 CYCLADES Kick-off meeting

Time 0 options Ø List of available collections Cyclades selected archives Ø Description of each collection Derived by the answers to the OAI protocol requests + …. . ? Ø Restriction fields DC + indexed fields of parallel metadata formats Ø Services Cyclades services on the selected documents 19 February 2001 CYCLADES Kick-off meeting

This is the end of the story 19 February 2001 CYCLADES Kick-off meeting

Create collection • Criterion specification: – Selection of existing collections – Composition of existing collections – Restriction 19 February 2001 CYCLADES Kick-off meeting

Abstract collection metadata • Polices description – ? ? 19 February 2001 CYCLADES Kick-off meeting

The collection criteria Ø Selection of one or more existing collections ü “Technical reports” Ø Composition of existing collections ü “Health” and “Information technology” Ø Restriction ü “Tecnical reports” on medicine, written in Italian, and available in downloadable digital form ü “Theses and dissertations” produced by students at Virgina Tech 19 February 2001 CYCLADES Kick-off meeting

Other collection criteria • plus others…. 19 February 2001 CYCLADES Kick-off meeting

Implementable criterion The given collection specification (criterion) must be implementable üSelection must operate on existing collections ü(which can be mapped into …. üRestriction must specify condition that can be evaluated on the collection/collection composition e. g. Theses of the “Virginia Tech collection” üSet of services/polices must be defined on the set of collection documents 19 February 2001 CYCLADES Kick-off meeting e. g. Search by author last name