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Description
Flashcards by Michael Riben, updated more than 1 year ago
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Created by Michael Riben
over 10 years ago
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| Question | Answer |
| what are the 2 main tasks of Information retrieval ? | INDEXING and RETRIEVAL |
| what does indexing refer to in Infrormation retrieval? | assign metadata to content items |
| what are 2 most common approaches to Retrieval ? | Boolean Searching, NAtural language Searching |
| what are the 4 categories of knowledge based content? | Bibliographic, Full text, Annotated, Aggregated |
| what are examples of bibiographic content? | Medline, Web catalogs, RSS |
| What are examples of Full Text knowledge bases? | Textbooks, Compendia, HAndbooks, journal Articles, MD Consult, web sites |
| what are examples of annotated knowledge bases content sources | image collections, EBM sites, CDS , Genomic Databases, etc |
| what are examples of annotated knowledge bases content sources | image collections, EBM sites, CDS , Genomic Databases, etc |
| what are examples of aggregated knolwedge content | MErch medicus, MEdline Plus |
| what are examples of aggregated knolwedge content | MErch medicus, MEdline Plus |
| what is indexing? | Assigment of metadata to content to facilitate retrieval |
| what are 2 major types of indexing for retrieval? | human indexing with controlled vocabulary and Automated indexing of all words |
| how is Human indexing performed? | performed by professional indexer with background in medicine, follows strict protocol, uses a hierarchical vocabulary like MESH |
| what gets indexed ? | Content and metadata can be indexed |
| WHat is automated indexing ? | computers index all words that occur in content items, uses stop words to remove common words form index, some will stem words. |
| WHat is automated indexing ? | computers index all words that occur in content items, uses stop words to remove common words form index, some will stem words. |
| what are the 2 methods of retrieval ? | Boolean and Natural Language |
| are Boolean and NAtural language retrieval Mutually exclusive? | No |
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