jsoup Java HTML Parser, with best of DOM, CSS, and jquery Robots exclusion standard The Robot Exclusion Standard, also known as the Robots Exclusion Protocol or robots.txt protocol, is a convention to advising cooperating web crawlers and other web robots about accessing all or part of a website which is otherwise publicly viewable. Robots are often used by search engines to categorize and archive web sites, or by webmasters to proofread source code. The standard is different from, but can be used in conjunction with, Sitemaps, a robot inclusion standard for websites. History[edit] The standard was proposed by Martijn Koster,[1][2] when working for Nexor[3] in February, 1994[4] on the www-talk mailing list, the main communication channel for WWW-related activities at the time. It quickly became a de facto standard that present and future web crawlers were expected to follow; most complied, including those operated by search engines such as WebCrawler, Lycos and AltaVista. About the standard[edit] A robots.txt file covers one origin. Disadvantages[edit] Alternatives[edit]
HBase - Installing Apache HBase (TM) on Windows using Cygwin Introduction Apache HBase (TM) is a distributed, column-oriented store, modeled after Google's BigTable. Apache HBase is built on top of Hadoop for its MapReduce and distributed file system implementation. All these projects are open-source and part of the Apache Software Foundation. As being distributed, large scale platforms, the Hadoop and HBase projects mainly focus on *nix environments for production installations. Purpose This document explains the intricacies of running Apache HBase on Windows using Cygwin as an all-in-one single-node installation for testing and development. Installation For running Apache HBase on Windows, 3 technologies are required: Java, Cygwin and SSH. Java HBase depends on the Java Platform, Standard Edition, 6 Release. Cygwin Cygwin is probably the oddest technology in this solution stack. To support installation, the setup.exe utility uses 2 directories on the target system. Make sure you have Administrator privileges on the target system. HBase Configuration
Robots.txt Tutorial How to Create Robots.txt Files Use our Robots.txt generator to create a robots.txt file. Analyze Your Robots.txt File Use our Robots.txt analyzer to analyze your robots.txt file today. Google also offers a similar tool inside of Google Webmaster Central, and shows Google crawling errors for your site. Example Robots.txt Format Allow indexing of everything User-agent: * Disallow: or User-agent: * Allow: / Disallow indexing of everything User-agent: * Disallow: / Disawllow indexing of a specific folder User-agent: * Disallow: /folder/ Disallow Googlebot from indexing of a folder, except for allowing the indexing of one file in that folder User-agent: Googlebot Disallow: /folder1/ Allow: /folder1/myfile.html Background Information on Robots.txt Files Robots.txt files inform search engine spiders how to interact with indexing your content. When you block URLs from being indexed in Google via robots.txt, they may still show those pages as URL only listings in their search results. Crawl Delay
CouchDB Java API - LightCouch Using a robots.txt file Using a robots.txt file Posted by Vanessa Fox A couple of weeks ago, we launched a robots.txt analysis tool. What is a robots.txt file? A robots.txt file provides restrictions to search engine robots (known as "bots") that crawl the web. Does my site need a robots.txt file? Only if your site includes content that you don't want search engines to index. Where should the robots.txt file be located? The robots.txt file must reside in the root of the domain. How do I create a robots.txt file? You can create this file in any text editor. What should the syntax of my robots.txt file be? The simplest robots.txt file uses two rules: User-Agent: the robot the following rule applies toDisallow: the pages you want to block These two lines are considered a single entry in the file. User-Agent A user-agent is a specific search engine robot. User-Agent: * Disallow The Disallow line lists the pages you want to block. URLs are case-sensitive. How do I block Googlebot? Google uses several user-agents.
Apache HttpComponents - Apache HttpComponents Basics - Webmaster Tools Help Crawling Crawling is the process by which Googlebot discovers new and updated pages to be added to the Google index. We use a huge set of computers to fetch (or "crawl") billions of pages on the web. The program that does the fetching is called Googlebot (also known as a robot, bot, or spider). Google's crawl process begins with a list of web page URLs, generated from previous crawl processes, and augmented with Sitemap data provided by webmasters. How does Google find a page? Google uses many techniques to find a page, including: Following links from other sites or pages Reading sitemaps How does Google know which pages not to crawl? Pages blocked in robots.txt won't be crawled, but still might be indexed if linked to by another page. Improve your crawling Use these techniques to help Google discover the right pages on your site: Submit a sitemap. Indexing Somewhere between crawling and indexing, Google determines if a page is a duplicate or canonical of another page. Improve your indexing
Search Engines: Information Retrieval in Practice Block or remove pages using a robots.txt file - Webmaster Tools Help A robots.txt file is a file at the root of your site that indicates those parts of your site you don’t want accessed by search engine crawlers. The file uses the Robots Exclusion Standard, which is a protocol with a small set of commands that can be used to indicate access to your site by section and by specific kinds of web crawlers (such as mobile crawlers vs desktop crawlers). What is robots.txt used for? Non-image files For non-image files (that is, web pages) robots.txt should only be used to control crawling traffic, typically because you don't want your server to be overwhelmed by Google's crawler or to waste crawl budget crawling unimportant or similar pages on your site. Image files robots.txt does prevent image files from appearing in Google search results. Resource files You can use robots.txt to block resource files such as unimportant image, script, or style files, if you think that pages loaded without these resources will not be significantly affected by the loss.
The Lovins stemming algorithm The first ever published stemming algorithm was: Lovins JB (1968) Development of a stemming algorithm. Mechanical Translation and Computational Linguistics, 11: 22-31. Julie Beth Lovins’ paper was remarkable for the early date at which it was done, and for its seminal influence on later work in this area. The design of the algorithm was much influenced by the technical vocabulary with which Lovins found herself working (subject term keywords attached to documents in the materials science and engineering field). The subject term list may also have been slightly limiting in that certain common endings are not represented (ements and ents for example, corresponding to the singular forms ement and ent), and also in that the algorithm's treatment of short words, or words with short stems, can be rather destructive. The Lovins algorithm is noticeably bigger than the Porter algorithm, because of its very extensive endings list.