Meta tags

Normal tags are about the content of the page, whereas meta tags are about the quality or characteristic of the content of the page.

Take a look at the children pages to see what meta tags are available. All of them have descriptions for when to use them.

In general, if you make a significant edit to a page, and feel that a meta tag no longer applies, feel free to delete it.

Meta tag pages should have aliases that end with “metatag”, e.g. “toolongmetatag”.


  • Out of date

    Meta tag used when the page has a lot of information that’s obsolete

  • Too long

    Meta tag used to indicate that this page is too long by Arbital’s standards.

  • List

    Meta tags for pages that are basically lists.

  • Just a requisite

    A tag for nodes that just act as part of Arbital’s requisite system

  • Start

    This page gives a basic overview of the topic, but may be missing important information or have stylistic issues. If you’re able to, please help expand or improve it!

  • Needs lenses

    This page has only a technical introduction. If you’re able to, please help by adding an intuitive explanation!

  • Non-standard terminology
  • Meta tags which suppress a page from being featured
  • Meta tags which request an edit to the page

    Tags that mean your page should be edited.

  • Needs summary

    This page does not have a summary which provides an informative overview of the page’s primary topic.

  • Needs image

    Meta tag for pages which would be improved by having images

  • Formal definition

    This page gives a purely formal definition of a topic, rather than motivating, explaining, and giving examples.

  • Needs exercises

    Add this tag to a page which doesn’t have enough exercises.

  • Guide

    Meta tag for the start page of a multi-page guide.

  • Needs technical summary

    Meta tag for pages which need a technical summary.

  • Needs brief summary

    Meta tag for pages which need a brief summary.

  • Work in progress

    This page is being actively worked on by an editor. Check with them before making major changes.

  • Needs clickbait

    This page does not have clickbait (a short teaser for the page displayed on various lists). Feel free to add it!

  • C-Class

    This page has substantial content, but may not thoroughly cover the topic, may not meet style and prose standards, or may not explain the concept in a way the target audience will reliably understand.

  • B-Class

    This page is mostly complete and without major problems, but has not had detailed feedback from the target audience and reviewers.

  • A-Class

    This page is well-written, high-quality, and essentially complete.

  • Featured

    This page is has been selected by Arbital to be featured and promoted.

  • Unassessed

    This page’s quality has not been assessed.

  • External resources

    This lens links out to other great resources across the web.

  • Needs alias

    This page needs a custom alias for the url.

  • Example problem
  • Needs parent

    This page is not attached to an appropriate parent page. If you know where it should go, please help categorize it!

  • Definition

    Meta tag used to mark pages that strictly define a particular term or phrase.

  • Disambiguation

    Several distinct concepts use this page’s name, this page helps readers find what they’re looking for.

  • Needs accessible summary

    This page needs a summary for a less technical audience.

  • Quality meta tags

    Meta tags which determine the page’s quality.

  • Formatting issues

    This page has formatting or mathjax issues.

  • Needs requisites

    This page has important requisites which are not listed. If you know what they are, you could help add them!

  • Hub page

    This tag is applied to pages which server the role of a “hub”: the user starts there, goes off to learn more about the topic, and then comes back. This meta tag modifies the page’s UI.

  • Needs splitting by mastery

    This page seems to serve multiple different mastery levels, and may benefit from being split into separate lenses.

  • Needs examples

    This page would benefit from more examples of the concept it teaches.

  • Needs links

    This page could do with more greenlinks.

  • Image requested

    An editor has requested an image for this page.

  • Seed

    Seeds are outlines of pages. They’re not much use for readers, but can help authors.

  • Opinion page

    Opinion pages represent one position on a topic (often from a single author), and are not necessarily balanced or a reflection of consensus.

  • Low-speed explanation
  • High-speed explanation
  • Concept

    Add this meta tag to pages which are concepts.

  • Stub

    This page only gives a very brief overview of the topic. If you’re able to, please help expand or improve it!


  • Arbital

    Arbital is the place for crowdsourced, intuitive math explanations.