Web Search Overview Crawling Web Search and Mining Lecture 1: Web Search Overview Web Crawling
Web Search Overview & Crawling 1 Lecture 1: Web Search Overview & Web Crawling Web Search and Mining
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Web Search Overview & Crawling 2 Algorithmic results. Paid Search Ads
Web Search Overview Crawling Search IR Search and Information Retrieval Search on the Web is a daily activity for many people throughout the world Search and communication are most popular uses of the computer Applications involving search are everywhere The field of computer science that is most involved with&D for search is information retrieval (IR) 3
Web Search Overview & Crawling 3 Search and Information Retrieval ▪ Search on the Web is a daily activity for many people throughout the world ▪ Search and communication are most popular uses of the computer ▪ Applications involving search are everywhere ▪ The field of computer science that is most involved with R&D for search is information retrieval (IR) Search & IR
Web Search Overview Crawling IR Information Retrieval "Information retrieval is a field concerned with the structure, analysis, organization, storage, searching, and retrieval of information. "(Salton, 1968) General definition that can be applied to many types of information and search applications Primary focus of ir since the 50s has been on text and documents 4
Web Search Overview & Crawling 4 Information Retrieval ▪ “Information retrieval is a field concerned with the structure, analysis, organization, storage, searching, and retrieval of information.” (Salton, 1968) ▪ General definition that can be applied to many types of information and search applications ▪ Primary focus of IR since the 50s has been on text and documents IR
Web Search Overview Crawling IR What is a Document? Examples: web pages, email, books, news stories scholarly papers, text messages, WordTM, PowerpointTM, PDF, forum postings, patents, etc. Common properties Significant text content Some structure (e.g., title, author, date for papers; subject, sender, destination for email)
Web Search Overview & Crawling 5 What is a Document? ▪ Examples: ▪ web pages, email, books, news stories, scholarly papers, text messages, Word™, Powerpoint™, PDF, forum postings, patents, etc. ▪ Common properties ▪ Significant text content ▪ Some structure (e.g., title, author, date for papers; subject, sender, destination for email) IR