Faceted Search (Synthesis Lectures on Information Concepts, by Daniel Tunkelang

By Daniel Tunkelang

We are living in a knowledge age that calls for us, greater than ever, to symbolize, entry, and use details. over the past a number of many years, we now have constructed a contemporary technology and know-how for info retrieval, relentlessly pursuing the imaginative and prescient of a "memex" that Vannevar Bush proposed in his seminal article, "As We may possibly Think." Faceted seek performs a key function during this software. Faceted seek addresses weaknesses of traditional seek ways and has emerged as a origin for interactive info retrieval. person reviews reveal that faceted seek presents more suitable information-seeking aid to clients than best-first seek. certainly, faceted seek has turn into more and more favourite in on-line info entry platforms, fairly for e-commerce and location seek. during this lecture, we discover the heritage, concept, and perform of faceted seek. even if we can't desire to be exhaustive, our objective is to supply adequate intensity and breadth to provide an invaluable source to either researchers and practitioners. simply because faceted seek is a space of curiosity to computing device scientists, details scientists, interface designers, and value researchers, we don't think that the reader is a expert in any of those fields. fairly, we provide a self-contained remedy of the subject, with an in depth bibliography when you want to pursue specific points in additional intensity. desk of Contents: I. Key recommendations / creation: What Are features? / details Retrieval / Faceted details Retrieval / II. examine and perform / educational examine / advertisement purposes / III. sensible matters / Back-End issues / Front-End issues / end / thesaurus

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Extra resources for Faceted Search (Synthesis Lectures on Information Concepts, Retrieval, and Services)

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All Varietals Red • Cabernet Sauvignon • Merlot • More Red Wines... White • Chardonnay • Sauvignon Blanc • More White Wines... Select Other Varietals All Regions United States France Italy Spain Select Other Regions From $____ to $____ 10 Min Rating: _____ SEE MATCHING WINES What kind of wine are you looking for? All Varietals Red • Cabernet Sauvignon • Merlot • More Red Wines... White • Chardonnay • Sauvignon Blanc • More White Wines... 2: Faceted navigation interface. 99 Cristalino Brut Cava ...

The cost of either approach depends on the specific data structures used to represent the inverted index and documents and particularly on what information is stored in memory compared to that on disk. Bottom-up approaches can be particularly expensive if they access external storage because the storage is likely to be scattered across the disk; in contrast, top-down approaches are more likely to take advantage of locality. Yonik Seeley, the creator of the open-source Solr described in the previous chapter, describes an approach that combines a top-down and a bottom-up approach to achieve better efficiency than either technique alone [87].

In practice, of course, the number of facets is finite, but it may be quite large. There is also the issue of dependence among facets. In his colon classification, Ranganathan intended the facets to be independent of one another; in most practical settings, however, we cannot assume such independence. City, state, and country may exist as three distinct facets rather than a single hierarchical facet; language and nationality are highly correlated and yet clearly distinct facets; and yet other facets, such as medical subject within a library catalog, may only apply to a subset of a document collection.

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