Since their introduction, a number of software packages have appeared to allow people to create their own weblog. Blog hosting sites and Web services to provide editing via the Web have proliferated. Common examples include GreatestJournal, Pitas, Blogger, LiveJournal, DeadJournal and Xanga.
Many more advanced bloggers prefer to generate their blogs by using server-side web applications such as Nucleus CMS, Movable Type, bBlog, WordPress, b2evolution, boastMachine, Antville and Serendipity to publish on their own website or a third party site, or to host a group of blogs for a company or school. Such programs provide greater flexibility and power, but require more knowledge. If they provide a Web interface for editing, server-based systems make it easy for travelers to create and edit text; many travelers like to produce their travelblogs from Internet cafes while they travel around the globe.
In addition, some people program their own blogs from scratch by using PHP, CGI, ASP, Perl, or other server side software. While these are much more difficult to create, they add a maximum potential for creativity.
Two features which are common to blogging are "blogrolls" and "commenting" or "feedback."
A blogroll is a list of other blogs that are linked separately from any article. This is one means by which a blogger creates a context for his blog, by listing other blogs that are similar to his/her own, or blogs the blogger thinks may be of relevance to users. It is also used as measure of the number of citations a blog has, and is used to rank "blog authority" in a manner similar to the way that Google uses hard coded HTML linking to create "page rank." Still another use of the "blogroll" is reciprocal linking: bloggers agree to link to each other, or link to another blog in hopes of getting a link in return.
Another central, and sometimes controversial, aspect of blogging is the use of a feedback comment systems. A comment system allows users to post their own comments on an article or "thread." Some blogs do not have comments, or have a closed commenting system which requires approval from those running the blog. For other bloggers, including several very prominent ones, comments are the crucial feature which distinguishes a "true" blog from other kinds of blogs. Commenting can either be built into the software, or added by using a service such as HaloScan. If a blog has regular commenters, this is referred to as the blog's community.
Tools such as Ecto and w.bloggar allow users to maintain their Web hosted blog without the need to be online while composing or editing posts. Enhancements to weblog technology continue to be developed, such as the TrackBack feature introduced by Movable Type in 2002 and subsequently adopted by other software companies (e.g., Userland) to enable automatic notification between websites of related content—such as a post on a particular topic or one which responds to a post on another blog. bBlog has gone as far as implementing threaded trackbacks on comments, and comments on trackbacks.
Blogs with features such as TrackBack are credited with complicating search engine page ranking techniques. Integrating these into search engines has proven to be a challenge, and has been used to deliberately "push" page rankings. However, as one Google executive remarked, it is the search engine's job to find the ways that a website represents a "vote" for another website.
Web hosting companies and online publications also provide blog creation tools, such as Salon, Tripod, Bravenet and America Online, which calls its subscriber blogs "journals."
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One of the pioneers of the tools that make blogging more than merely websites that scroll is Dave Winer. One of his most important contributions was the creation of servers which weblogs would ping to show that they had been updated. Blog reading utilities, such as Blogrolling, use the aggregated update data to show a user when their favorite blogs have new posts.
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