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Conversation threading

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Title: Conversation threading  
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Conversation threading

Thread view in a discussion group. At the top level, a discussion with several posts. Next to the subject, number of lines, sender and date is shown for each post.

Conversation threading is a feature used by many email clients, bulletin boards, newsgroups, and Internet forums in which the software aids the user by visually grouping messages with their replies. These groups are called a conversation, topic thread, or simply a thread. A discussion forum, e-mail client or news client is said to have a "conversation view", "threaded topics" or a "threaded mode" if messages can be grouped in this manner.

Threads can be displayed in a variety of different ways. Early messaging systems (and most modern email clients) will automatically include original message text in a reply, making each individual email into its own copy of the entire thread. Software may also arrange threads of messages within lists, such as an email inbox. These arrangements can be hierarchical, arranging messages close to their replies in a tree, or they can be linear, displaying all messages in chronological order regardless of reply relationships.


Contents

  • Advantages 1
    • Message Targeting 1.1
    • Eliminating List Clutter 1.2
  • Disadvantages 2
    • Reliability 2.1
    • Individual Message Control 2.2
    • Fragmentation 2.3
  • Types of threads 3
  • Examples 4
    • Client-based 4.1
    • Web-based 4.2
  • References 5

Advantages

Threaded discussions allow the reader to appreciate quickly the overall structure of a conversation. As such it is most useful in situations with extended conversations or debates, such as newsgroups and complicated email chains.

Message Targeting

Email allows messages to be targeted at particular members of the audience by using the "To" and "CC" lines. But some message systems don't have that option. As a result, it can be difficult to determine the intended recipient of a particular message. When messages are displayed hierarchically, it's easier to visually identify the author of the previous message.

Eliminating List Clutter

It can be difficult to absorb important information when viewing large lists of messages. Grouping threads of messages can allow users to preview messages quicker.

In group forums, allowing users to reply to threads will reduce the number of new posts shown in the list.

Disadvantages

Reliability

Accurate threading of messages requires the software to identify messages that are replies to other messages. Some algorithms used for this purpose can be unreliable. For example, email clients that use the subject line to relate messages can be fooled by two unrelated messages that happen to have the same subject line.

Individual Message Control

Messages within a thread do not always provide the user with the same options as individual messages. For example, it may not be possible to move, star, reply to, archive, or delete individual messages that are contained within a thread.

The lack of individual message control can prevent messaging systems from being used as to-do lists (a common function of email folders). Individual messages that contain information relevant to a to-do item can easily get lost in a long thread of messages.

Fragmentation

In messaging systems that display threads hierarchically (as opposed to linearly), discussions can easily become fragmented. Unlike systems that display messages linearly, it is much easier to reply to individual messages that are not the most recent message in the thread.

Thread fragmentation can be particularly problematic for systems that allow users to choose different display modes (hierarchical vs. linear). Users of the hierarchical display mode will reply to older messages, confusing users of the linear display mode.

Types of threads

An open thread refers to a blog post where readers may comment and discuss any topic that they choose. They are usually more useful on popular blogs with large amounts of traffic; they are often used when the author of the blog has no subject matter to post on or when there is a lull in posting.

Examples

The following messaging software can group and display messages by thread.

Client-based

Web-based

References

  • cited in
  • Wolsey, T. DeVere, "Literature discussion in cyberspace: Young adolescents using threaded discussion groups to talk about books. Reading Online, 7(4), January/February 2004. Retrieved 2007-12-30.
  • Network Working Group,IETF (June 2008). "Internet Message Access Protocol - SORT and THREAD Extensions". Retrieved 2009-10-10.
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