Overview

Fetch is the first stage in a harvest. It accesses the external source and orders the information in a simple RDF/XML file. The configuration task file determines properties of the fetch (ex. for the JDBCFetch it includes queries, table names, where clauses, fields, delimiters).

Process Diagram

1. External Data Source - This is the foreign source
2. Fetch - Retrieves data from foreign source
3. Raw Data - A simple database or as simple XML
4. Translate - Turns the raw data into Ontological RDF
5. RDF - RDF models which can be dumped into RDF/XML.
6. Score - First find similarities and rate them, second determine and apply matches based on a threshold of difference.
7. Qualify - Changes any unmatched data
8. Transfer (Update) - move into a vivo model (through an update process if possible.)
9. Vivo - Final model in RDF visible from the webapp. |

Tools

• OAIFetch: Tool for fetching from OAI repositories
• NIH Fetches
  • PubmedFetch
  • NLMJournalFetch
• RDB Fetches
  • JDBCFetch
  • D2RMapFetch