Implementing Semantic Search
Upcoming SlideShare
Loading in...5
×
 

Implementing Semantic Search

on

  • 9,651 views

Semantic search helps business people find answers to pressing questions by wading through oceans of information to find nuggets of meaningful information. In this presentation we’ll discuss how ...

Semantic search helps business people find answers to pressing questions by wading through oceans of information to find nuggets of meaningful information. In this presentation we’ll discuss how semantic search and content analysis technologies are starting to appear in the marketplace today. We’ll provide a recap of what semantic search is and what the key benefits are, then we’ll answer the following questions:
• Is semantic search a feature, an application, or enterprise system?
• How can I add semantic search to my existing work processes?
• Will I need to replace my existing content technologies?
• What will I need to do to prepare my content for semantic search?
• Is semantic search just for documents or can I search my data too?
• Can I use semantic search to find information on the internet and other public data sources?
• Are there standards to consider?

Statistics

Views

Total Views
9,651
Views on SlideShare
9,516
Embed Views
135

Actions

Likes
8
Downloads
318
Comments
2

7 Embeds 135

http://thecontentguy.net 69
http://llamadavirtual.wordpress.com 32
http://www.slideshare.net 24
http://www.linkedin.com 7
http://www.netvibes.com 1
http://www.lmodules.com 1
http://paper.li 1
More...

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel

12 of 2

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
  • Marvellous :)
    Are you sure you want to
    Your message goes here
    Processing…
  • Best one
    Hope you are in good health. My name is AMANDA . I am a single girl, Am looking for reliable and honest person. please have a little time for me. Please reach me back amanda_n14144@yahoo.com so that i can explain all about myself .
    Best regards AMANDA.
    amanda_n14144@yahoo.com
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Implementing Semantic Search Implementing Semantic Search Presentation Transcript

  • Implementing Semantic Search in the Enterprise Paul Wlodarczyk Director of Consulting Services Earley & Associates Amber Swope
  • Questions we will answer today
    • What is Semantic Search?
    • How is Enterprise Search different from Internet Search?
    • Why Semantic Enterprise Search?
    • How do you implement enterprise semantic search? Examine people, process, technology, and content.
    • How do I prepare my content to enable semantic search?
    • What technologies are there and how do they differ?
    • What can I search?
  • What is Semantic Search?
    • semantic adj. Of or relating to meaning in language or communications.
    • Semantic search uses language processing to assess the “meaning” of content (documents or web pages) and the “meaning” of search queries to return more relevant results (better matches in meaning)
    • Key concepts:
      • Taxonomy, Named Entity, Ontology, Tag
  • Key concept: Taxonomy
    • taxonomy n. A categorization scheme for content, often hierarchical.
      • Example: the animal kingdom
    • Most often, taxonomies show “is a” relationships
      • Example:
        • A mammal is a vertebrate
        • A rodent is a mammal
        • A rabbit is a rodent
  • Key concept: Named Entity
    • named entity n. A person, organization, place, thing, or event identified in a body of text
    • Entities are distinct from terms in that they are unambiguous.
      • e.g. “Washington” is a term that is ambiguous to an entity (the first President, the city, the state, the US Government, the monument).
      • A tagged named entity is unambiguous
  • Example: Named Entities
  • Key concept: Ontology
    • ontology n. A set of relationships between entities.
    • Often these are in subject-predicate-object [triple] format.
    • Often ontologies relate entities that exist in multiple taxonomies .
    • Example :
    • A food chain is a set of relationships (predator/prey) between entities (animals, plants) that exist in different taxonomies (kingdoms). The relationships are triples:
      • Rodents eat seeds of grasses.
      • Fox eats rodents.
      • Kangaroo rat is a rodent.
      • Rye is a grass. Etc.
  • How does semantic search work?
    • Assess meaning of documents
      • Identify named entities and relationships (triples) OR
      • Categorize documents to taxonomies OR
      • Score each document with a “signature” or “graph”
    • “ Tag” documents for meaning (categories, entities, triples, semantic signatures, graphs, etc.)
    • Index the documents
    • Assess meaning of search terms
    • Match documents to search terms via common meaning
    Meaning [search term] Meaning Meaning
  • Enterprise Search vs. Web Search Web Search Enterprise Search Search corpus Every public webpage – the whole internet Public documents in the enterprise, departmental docs, plus local docs (My Documents) Context Generic : Shopping or seeking news and information Company-specific: Executing a role in a business process Taxonomies / categories Generic – Open Directory Project, Wikipedia, News, etc. Domain Specific (customers, organization, products, technologies, processes) Info Security Information is public Information is secure with role-based access controls Search algorithms
    • Keyword and Link-based
    • Links = relevancy
    • Popularity = relevancy
    • Professionally tagged
    • Keyword & tag-based
    • No links!
    • No traffic!
    • Inconsistent metadata tags!
    Perfect result Most popular content Highest quality content
  • Why Semantic Enterprise Search?
    • Semantic analysis can provide the context, relevancy, and consistency that is lacking in enterprise content creation and search
      • Enterprise content lacks the connectedness that internet search exploits
      • “ Traffic” is not a clue to relevancy in enterprise search
      • Enterprise users do not consistently tag content with metadata
  • Another key difference in Enterprise Search: Social Context
    • In “enterprise search” is that we know a lot more about “who” is searching and “who” has authored “what”
    • We understand the community a lot better in the enterprise
  • Roadmap for implementing semantic search
    • Implement Enterprise Content Management
    • Implement Enterprise Search
    • Layer-in semantic analysis to improve search relevancy
    • Semantic search isn’t a replacement to ECM and enterprise search. It’s a “sweetener.”
    Implement ECM Implement Enterprise Search Exploit Semantic Search
  • ECM and Enterprise Search Roll-out Strategy & Plan Implement Deploy Maintain People Use cases and User Experience Job Redesign, Communities Training Incentives for participation Process Content Lifecycle Analysis Workflow, bus. rules, process redesign Governance Evergreen process for maintaining IA Technology Business & system req’ts, technical architecture ECM and Search Implementation Desktop integration (classification, search) Social tech (ratings, tags, bookmarks) Content Content Analysis, Information Architecture, Taxonomy dev’t Content migration Content classification tools, search tools Taxonomy maintenance, folksonomy Strategy & Plan Implement Deploy Maintain
  • Layer-in Semantic Enterprise Search Semantic technologies play a role in content classification – from defining taxonomies and ontologies, to tagging documents, to improving search terms and hits – as well as in search and discovery Strategy & Plan Implement Deploy Maintain People Use cases and User Experience Job Redesign Training Incentives for participation Process Content Lifecycle Analysis Workflow, bus. rules, process redesign Governance Evergreen process for maintaining IA Technology Business & system req’ts, technical architecture ECM and Search Implementation , Semantic search implementation Desktop integration (classification, search) Social tech (ratings, tags, bookmarks) , machine learning Content Content Analysis, Information Architecture, Taxonomy dev’t Content migration , build triple stores, semantic training sets Content classification tools, search tools Taxonomy maintenance, folksonomy Strategy & Plan Implement Deploy Maintain
  • Classify, Navigate, Search, Retrieve Content within the Enterprise Content Author Check-in & Classify Document or Content Object Retrieve Document or Content Object Retrieve Unformatted Content End User Retrieve Formatted Content Retrieve Document End User End User
  • Strategy and Plan: Key Activities
    • Business Objectives : Understand the key business problems that must be solved
    • People : Understand actors, roles, and use cases (who creates, who files, who searches, etc.)
    • Process : Understand content lifecycle: how you create, maintain, reuse, and publish content
    • Technology : Understand existing technology and new requirements for all use cases
    • Content : Understand existing content, classification, policies, reuse, multichannel, etc.
  • Strategy and Plan: Deliverables
    • Business Objectives : Define the ROI in terms of the key metrics and how they will trend
    • People : Actors, roles, and Use Cases elaborated into System And Business Requirements
    • Process : Desired state Content Lifecycle defined
    • Technology : Systems Architecture completed and new technology modules defined, integration points with existing technology defined
    • Content : Information Architecture : How content will be structured, classified, managed, reused, and searched
  • Strategy and Plan: Semantic Search Considerations: Technology
    • Semantic technologies need to be considered and evaluated as part of the technical architecture, including:
      • Categorizers (for auto-tagging, clustering)
      • Entity extraction
      • Triple stores and inference engine
      • Tag servers
      • Desktop integration (expose UX into authoring and search tools)
  • Strategy and Plan: Semantic Search Considerations: Content
    • Semantic tools can aid content analysis activities including taxonomy, ontology, and name directory development
    • Knowing which semantic approaches will be used for navigation, search, and retrieval (taxonomy, named entity, ontology) will inform the information architecture analysis and content classification
  • Preparing Content for Semantic Search Strategy & Plan Implement Deploy Maintain
  • Analyze existing content
    • Know what you have
      • Number of retrievable units?
      • Size of each retrievable unit?
      • Current retrieval method?
    • Understand its use
      • Who retrieves it?
      • When they need it?
      • How they find it?
      • How often need it?
    • Determine the relationships between retrievable units
  • Key Considerations
    • Search Objectives
      • Who is searching for what? How do they search? How do they expect to see results? How do they rank quality and relevance?
    • Content
      • Where is it? Federation? What types of documents? Security issues? Is XML or other special content types involved? Component documents or content reuse?
    • User Experience (UX)
      • What is a balance between user expectations and an effective UI design? Are you involving users in the design? How can you embed the UX into daily tools (mail, desktop, browser, CMS)?
  • Define content structure
    • Define authoring units
      • Size?
      • File format?
    • Define storage units
      • Size?
      • Relationships between units?
    • Define retrieval units
      • Documents
      • Components
      • Topics/chunks
  • Classify content
    • Define terms and thesauri
    • Develop taxonomies
      • How many?
      • Relationship between them?
      • Where/how stored?
    • Apply taxonomy values to content
      • When are values applied?
      • Who is responsible for applying/reviewing?
      • What can be automated?
    • Develop ontologies (if using triples)
  • Define metadata
    • Identify what data is needed
    • Define the values
      • How used?
      • Where/how stored?
    • Apply metadata values to content
      • When are values applied?
      • Who is responsible for applying/reviewing?
      • What can be automated?
  • Control content
    • Identify relationship between storage, retrieval and display mechanisms
      • Same?
      • Different?
      • Relationship between them?
    • Define storage strategy
      • Where is content stored?
      • Where is metadata stored?
      • Where are deliverables stored (if generated)?
      • How many repositories?
      • Who needs access to each one?
  • Information Architecture for Semantic Search
    • Information Architecture
    • Structure content for retrieval
    • Apply retrieval support at appropriate level
  • What technology does semantic search implementation require?
    • Semantic Tagging Technology
      • “ Train” a system to auto-categorize documents; taxonomy server
      • Named entity extraction; directory server
      • Analyze against “triples”; triple stores plus inference engines
      • Augment automatic tags with user tags and refinements
    • Semantic Search Technology
      • Disambiguate search terms to their meaning
      • Map “meaning” of search term to “meaning” of document
      • Refine “meaning” of search terms (clustering / similarity: “more like this”)
    • Integration Technology
      • User experience for check-in, classification and NS&R
      • Desktop integration with browsers, email, and authoring tools
      • Integration frameworks to tie semantic services with existing enterprise search and content management
  • What can I search?
    • Content in ECM
      • By using semantic tags in ECM metadata
    • Content on your desktop
      • By semantically tagging and indexing
    • Content on the web
      • By searching semantic metadata (e.g. RDF, linked data URIs)
    • Databases
      • By using XML Data Stores to make relational data available as a “document” that can be tagged
  • Standards
    • Resource Description Framework (RDF)
      • Make statements about resources in triples format
    • W3C Semantic Web Standards (“linked data”)
      • Use URIs to point to data in the web
      • Turn web pages into databases
  • Recap
    • Semantic search improves search relevance by matching meaning of search terms to meaning of documents
    • Semantic technologies include categorizers, entity extractors, and linguistic analysis of relationships between entities (triplets)
    • Semantic technologies are available as plug-ins to enterprise systems, or “baked in” to enterprise systems
    • Semantic search requires extra steps along the way in implementing ECM and enterprise search