WP3: Fact Extractor Scheme Progress Report CROSSMARC Fourth Meeting Athens 28 February-1 March 2002.

Presentazione sul tema: "WP3: Fact Extractor Scheme Progress Report CROSSMARC Fourth Meeting Athens 28 February-1 March 2002."— Transcript della presentazione:

1 WP3: Fact Extractor Scheme Progress Report CROSSMARC Fourth Meeting Athens 28 February-1 March 2002

2 FE Scheme: overview Main goal To describe expected FE output format (structure agreement) To validate a description of a product offer (content agreement) Design choices Three (or four) parts Basic types Ontology types (domain) NERC constraints (language) FE Scheme (task)

3 FE Scheme: diagram 28 different tags under prodDesc

4 FE Scheme: component level tags batteryLife batteryMake cardCategory cardNumber cdromSpeed depth dvdSpeed floppyMake hdCapacity height is_model made_by modemSpeed pointDevice port preinstalledOS price processorMake processorSpeed ram screenMake screenResolution screenSize soundSupport videoOut warranty weight width

5 FE Scheme: element Types

6 FE Scheme: ontology types

7 FE Scheme: basic types

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9 Notebook Acer Travelmate 612 TX Notebook all in one da 2,4kg ideale per coloro che hanno bisogno di avere sempre a disposizione un sistema leggero, completo, potente e versatile. Case colore antracite Processore INTEL Pentium III a 900 MHZ RAM 128 MB Hard Disk 20 GB Display 14,1" XTFT Lettore CD-ROM 24 x Modem 56 KBPS interno Scheda rete integrata si Cod. 99.36 Compresi nel prezzo Floppy disk Acer esterno su USB Acer Advantage Cod. U1.52 L'estensione della garanzia da 1 a 3 anni prevede: Spese di trasporto a carico di Acer con presa e riconsegna Supporto telefonico gratuito per tutta la durata della garanzia 2.013,67 £. 3.899.000

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11 Acer Travelmate 612 TX 2,4kg INTEL Pentium III 900 MHZ 128 MB 20 GB 14,1" XTFT 24 x 56 KBPS £. 3.899.000

12 FE Scheme: current issues Numerical expression normalization retain the original unit be expressed in a standard one Content validation Numerical expression measure units (OK) Range checking (TO BE DONE) Named entities Closed sets (OK) Open sets (no way, rely on normalization)

13 FE Scheme: current issues Choose a set of features to be represented Not all the ontology attributes must be included in the final description Maybe the same holds for normalization FE output Mixed content model vs pure XML model Fix order tags vs free order tags Retain some physical structure or not The last issue is IMPORTANT for multiple values