Wiki

Editor-In-Chief: Prab R Tumpati, MD
Obesity, Sleep & Internal medicine
Founder, WikiMD Wellnesspedia &
W8MD's weight loss doctor NYC
Philadelphia GLP-1 weight loss and GLP-1 clinic NYC

A wiki is a collaborative web-based system for creating, editing, linking, and organizing pages of knowledge.

A wiki is a type of website, hypertext document collection, and collaborative software system that allows users to create, edit, organize, and link pages through a web browser. Wikis are designed for rapid collaboration, easy updating, and the creation of interconnected knowledge bases. The word wiki comes from the Hawaiian language phrase wiki wiki, meaning "quick" or "very fast."

A wiki may refer either to the software that powers collaborative editing or to the collection of pages created using that software. A single page in a wiki is called a wiki page, while the full collection of pages is called the wiki. Modern wikis are widely used for online encyclopedias, medical encyclopedias, documentation, knowledge management, education, public health information, software documentation, and collaborative research.

WikiMD is an example of a specialized health and medical wiki. It uses wiki-based technology to organize a large body of information on medicine, health, diseases, drugs, nutrition, food, wellness, anatomy, Gray's Anatomy, medical terminology, patient education, and preventive medicine.

Overview

A wiki makes it possible for content to be developed in an open, flexible, and interconnected way. Unlike traditional static websites, a wiki allows pages to be edited and expanded over time. Pages are connected through internal links, arranged into categories, and tracked through page histories and recent changes.

The key idea behind a wiki is that knowledge improves when it is easy to create, correct, update, and connect. Instead of requiring complex web design tools, most wikis use simple markup and editing interfaces. This allows contributors to focus on content rather than technical formatting.

Meaning of the word wiki

The term wiki was popularized by Ward Cunningham, who created the first wiki, the WikiWikiWeb, in 1995. The name was inspired by the Hawaiian term wiki wiki, meaning quick. Cunningham used the word to describe a system that allowed web pages to be created and edited quickly.

The original WikiWikiWeb was the Portland Pattern Repository, a collaborative site used by software developers to discuss design patterns and programming concepts.

Key characteristics

A typical wiki has several defining characteristics:

• Fast editing - pages can be edited quickly through a browser.
• Collaborative authorship - multiple users may improve the same page.
• Internal linking - pages are connected through links to related topics.
• Simple markup - content can be formatted using easy wiki syntax.
• Revision history - older versions of pages are preserved.
• Recent changes - new edits can be monitored by users or administrators.
• Open structure - pages may be created as needed.
• Community correction - errors can be corrected by later edits.
• Categories and templates - content can be organized and standardized.
• Searchability - users can search across the knowledge base.

Advantages of a wiki

Wikis have many advantages for collaborative publishing and knowledge management:

• They are easily accessible through a web browser.
• They usually require no special software for basic editing.
• They allow rapid content creation and revision.
• They support collaboration among many contributors.
• They allow pages to be updated as knowledge changes.
• They preserve old versions through page history.
• They support internal linking among related topics.
• They make it easy to identify recent changes.
• They encourage shared responsibility for content quality.
• They can organize large bodies of information through categories and templates.

For a health knowledge resource such as WikiMD, these advantages are especially useful because medicine, nutrition, pharmacology, public health, and patient education are constantly evolving fields.

Wiki pages

A wiki page is an individual page in a wiki. It may contain text, images, tables, templates, links, references, categories, and other formatting.

A wiki page usually has two main forms:

• The displayed page, which is rendered as formatted content in HTML
• The editable source, which is written in a simplified markup language

This design allows users to write and edit content without needing to write complex HTML code.

Wiki markup

Wiki markup is a simplified markup language used to format pages in many wiki systems. It allows contributors to add headings, bold text, italics, links, images, lists, tables, categories, and templates.

Common wiki markup examples include:

Purpose	Wiki markup	Rendered result
Bold text	'''Medicine'''	Medicine
Italic text	''Health''	Health
Internal link	[[Diabetes]]	Diabetes
Piped internal link	[[Hypertension|high blood pressure]]	high blood pressure
Heading	==Diagnosis==	Section heading
Bullet list	* Item	Bullet point
Category	[[Category:Medicine]]	Adds page to a category
Template	{{Medicine}}	Inserts a reusable template

Example of wiki syntax

The following example shows how wiki syntax can produce formatted text:

Wiki syntax	Rendered output
'''WikiMD''' is a free [[medical encyclopedia]] covering [[health]], [[drug]]s, [[disease]]s, and [[nutrition]].	WikiMD is a free medical encyclopedia covering health, drugs, diseases, and nutrition.

This simple syntax allows contributors to create structured encyclopedia pages without needing advanced web design knowledge.

HTML and wiki markup

Many web pages are ultimately displayed as HTML, but wiki users usually edit pages in wiki markup instead of raw HTML. This approach has several benefits:

• It makes editing easier for non-programmers.
• It keeps formatting consistent across the site.
• It reduces the risk of unsafe scripts or broken layouts.
• It allows the wiki software to manage links, templates, and categories.
• It separates content creation from technical page rendering.

Some wiki systems also provide WYSIWYG editors, allowing users to edit visually while the system converts the changes into markup or HTML.

Internal links

Internal links are one of the most important features of a wiki. They allow one page to connect directly to another page in the same wiki.

For example:

[[Diabetes]]
[[Hypertension]]
[[Nutrition]]
[[Gray's Anatomy]]

These links create a web of related concepts. On WikiMD, internal links help readers move between topics such as obesity, insulin resistance, type 2 diabetes, metformin, semaglutide, nutrition, and weight loss.

Creating new pages

In many wikis, new pages are created by first making a link to a page that does not yet exist. The link may appear in a different color or with a special marker. When a user clicks the link, the wiki opens an editing interface for the new page.

This process helps prevent orphan pages because new pages are usually created from existing related pages.

For example, a WikiMD editor writing about periodontology might create links to:

• Gingiva
• Periodontal ligament
• Alveolar bone
• Cementum
• Periodontitis

If one of those pages does not yet exist, the link can serve as a starting point for creating it.

Categories

Categories are used to organize wiki pages into topic groups. A page can belong to one or many categories.

Examples on WikiMD include:

Categories help readers browse related pages and help editors maintain large groups of articles.

Templates

A template is a reusable page component that can be inserted into other pages. Templates can standardize formatting, navigation, article notices, infoboxes, and topic boxes.

Examples include:

• {{Medicine}}
• {{Public health}}
• {{Patient education}}
• {{Medical disclaimer}}
• {{Infobox disease}}
• {{Infobox drug}}
• {{health encyclopedia}}

Templates are especially useful in medical encyclopedias because many articles share common structures. For example, a disease article may use an infobox, a patient education notice, and category templates.

Infoboxes

An infobox is a structured summary box often placed near the top of an article. It provides quick facts about a topic.

On WikiMD, infoboxes may be used for:

• Diseases
• Drugs
• medical specialties
• Medical procedures
• Health topics
• Technology topics
• Nutrients
• Foods

A disease infobox may include symptoms, causes, diagnosis, treatment, prevention, and specialist type.

Recent changes

Most wikis include a Recent changes page, which lists recent edits across the site. This feature allows editors and administrators to monitor activity, identify vandalism, review new contributions, and maintain quality.

On WikiMD, recent changes are useful for tracking updates to medical articles, template changes, category edits, and new page creation.

Page history

Every wiki page typically has a page history that stores previous versions of the page. This allows editors to:

• Review earlier versions
• Compare revisions
• Identify who made a change
• Restore a previous version if needed
• Track the development of an article over time

This is especially important for health information because it supports transparency and correction.

Diff feature

A diff is a comparison between two versions of a page. It shows what text was added, removed, or changed. Diffs are useful for reviewing edits and deciding whether a change improved the page.

For example, a diff can show whether a medication article was updated to add a new adverse effect, remove inaccurate information, or add internal links.

Correcting mistakes

A central principle of wiki design is that it should be easy to correct mistakes. Instead of trying to prevent every possible error before publication, wikis allow fast correction through editing, recent changes monitoring, history review, and page restoration.

This approach works best when there is an active editorial community and clear standards for content quality.

Controlling spam and vandalism

Public wikis may face spam, vandalism, low-quality edits, or promotional content. Common anti-spam and quality-control methods include:

• Monitoring recent changes
• Reverting harmful edits
• Blocking abusive users
• Protecting important pages
• Using edit filters
• Requiring user registration for some actions
• Reviewing new pages
• Using bots for maintenance
• Limiting external links
• Categorizing maintenance pages

For medical sites such as WikiMD, controlling spam and misinformation is especially important because readers may rely on health information for education and decision-making.

Page protection

Page protection prevents some or all users from editing a page. It is commonly used for high-traffic pages, templates, main pages, policy pages, or pages repeatedly targeted by vandalism.

On WikiMD, page protection may be useful for:

• The Main Page
• Important medical templates
• High-use drug infoboxes
• Legal disclaimer pages
• Frequently vandalized articles
• Core navigation pages

Although open editing is a traditional wiki principle, page protection can be necessary to preserve site stability and trust.

User registration

Some wikis allow anonymous editing, while others require registration. Registered accounts can help with attribution, communication, watchlists, user permissions, and spam control.

User accounts may allow:

• Editing pages
• Creating new pages
• Uploading files
• Watching pages
• Communicating with other editors
• Accessing advanced editing tools
• Receiving permissions such as administrator rights

Watchlists

A watchlist allows a registered user to monitor selected pages. When a watched page is edited, the user can review the change. Watchlists help contributors maintain topics they care about.

On WikiMD, a medical editor may watch pages related to:

• Diabetes
• Hypertension
• Drug
• Pharmacology
• Obesity
• Nutrition
• Gray's Anatomy
• Rare diseases

Stubs

A stub is a short article that needs expansion. Many wikis use stub templates to mark pages that require more content.

A stub notice may invite users to expand the article. On WikiMD, stubs may occur in areas such as rare diseases, medical procedures, drug pages, food pages, or anatomy topics.

Orphan pages

An orphan page is a page with few or no incoming links from other pages. Wikis try to reduce orphan pages because internal linking improves navigation and search discoverability.

Good wiki editing includes adding related links from existing pages to new pages.

Disambiguation pages

A disambiguation page helps readers choose among topics with similar names. For example, a medical term may refer to a symptom, a disease, a drug, an anatomical structure, or an abbreviation.

Disambiguation is important in medicine because many abbreviations and terms have multiple meanings.

Redirects

A redirect automatically sends users from one page title to another. Redirects are useful for synonyms, spelling variants, abbreviations, and alternate names.

Examples:

#REDIRECT [[Myocardial infarction]]
#REDIRECT [[Type 2 diabetes]]
#REDIRECT [[Amyotrophic lateral sclerosis]]

Redirects help readers find the correct article even if they use a different term.

CamelCase and free links

Early wikis often used CamelCase to create links automatically. CamelCase joins words together and capitalizes each word, as in:

TableOfContents
BeginnerQuestions
WikiWikiWeb

While CamelCase made linking easy, it often produced unnatural page titles. Modern wiki software, including MediaWiki, usually uses free links with double brackets:

[[Table of contents]]
[[Beginner questions]]
[[WikiWikiWeb]]

Free links are more readable and better suited for encyclopedia-style content.

Interwiki links

Interwiki links connect pages across different wikis. They allow one wiki to link to another using a special prefix. Interwiki systems help connect related knowledge projects.

Examples of projects that may be linked from a medical wiki include:

• Wikipedia
• Wikimedia Commons
• Wikidata
• PubMed
• MedlinePlus
• ClinicalTrials.gov

Wiki software

Wiki software is the software platform that powers a wiki. Different wiki engines provide different features, editing systems, permissions, databases, templates, and extensions.

Examples of wiki software include:

• MediaWiki
• MoinMoin
• TWiki
• UseModWiki
• DokuWiki
• Tiki Wiki CMS Groupware
• PmWiki

MediaWiki

MediaWiki is an open-source wiki software platform originally developed for Wikipedia and now used by many other wikis, including specialized knowledge projects.

MediaWiki supports:

• Page editing
• Revision histories
• User accounts
• Templates
• Categories
• File uploads
• Parser functions
• Extensions
• Special pages
• Redirects
• Watchlists
• Page protection
• Internationalization
• API access

WikiMD uses MediaWiki-style features to organize a large collection of pages on medicine, food, health, nutrition, wellness, and medical education.

WikiMD as a medical wiki

WikiMD is a specialized medical, food, and wellness wiki. It applies wiki principles to health-related knowledge.

WikiMD includes extensive content on:

• Medicine
• Diseases
• Rare diseases
• Drugs
• Medications
• Pharmacology
• Anatomy
• Gray's Anatomy
• Physiology
• Pathology
• Nutrition
• Food
• Diet
• Weight loss
• Preventive health
• Public health
• Patient education
• Medical terminology
• Artificial intelligence in healthcare

WikiMD and medical education

WikiMD can support medical education by providing interconnected articles on:

• Human anatomy
• Physiology
• Pathology
• Microbiology
• Immunology
• Pharmacology
• Clinical medicine
• medical specialties
• USMLE Step 3 CCS
• Clinical reasoning
• Patient management
• Evidence-based medicine

Students can use internal links to move from basic concepts to clinical applications. For example, a learner studying hypertension can follow links to blood pressure, cardiovascular system, kidney, renin-angiotensin system, diuretic, ACE inhibitor, stroke, and heart failure.

WikiMD and patient education

WikiMD can also support patient education by explaining medical topics in clear, structured language.

Patient-centered topics may include:

• When to call a doctor
• Preventive health
• Medication safety
• Diabetes education
• Hypertension
• Obesity
• Nutrition
• Weight loss
• Vaccination
• Cancer screening
• Palliative care
• Advance care planning

Health information should always be used for education and should not replace advice from a qualified health care provider.

WikiMD and nutrition

WikiMD includes content on food, nutrition, diet, healthy eating, ketogenic diet, low-carbohydrate diet, weight loss, obesity, insulin resistance, and metabolic syndrome.

Nutrition-related wiki pages can connect food topics to:

• Diabetes mellitus
• Hypertension
• Heart disease
• Fatty liver disease
• Obesity
• Cholesterol
• Digestive health
• Micronutrient
• Vitamin
• Mineral
• Public health nutrition

WikiMD and drug information

WikiMD includes drug and pharmacology topics such as:

• Drug
• Medication
• Pharmacology
• Mechanism of action
• Indication
• Contraindication
• Adverse effect
• Drug interaction
• Pharmacokinetics
• Pharmacodynamics
• Antibiotic
• Antiviral drug
• Analgesic
• Antidepressant
• Diabetes medication
• Semaglutide
• Tirzepatide

Drug information pages should be written carefully, kept current, and used with appropriate medical judgment.

Quality and reliability in a medical wiki

A medical wiki should emphasize accuracy, neutrality, readability, and safety. Important quality principles include:

• Clear definitions
• Appropriate internal links
• Current medical terminology
• Evidence-informed content
• Avoidance of exaggerated claims
• Clear distinction between education and medical advice
• Proper categorization
• Use of templates and infoboxes
• Patient safety warnings when appropriate
• Regular review and updating

Medical disclaimer

Medical wiki content is educational and should not replace professional medical care. Readers should consult a licensed physician, dentist, pharmacist, nurse practitioner, or other qualified health professional for diagnosis and treatment. Emergency symptoms such as chest pain, shortness of breath, stroke symptoms, severe bleeding, severe allergic reaction, or loss of consciousness require immediate medical attention.

Applications of wikis

Wikis are used in many fields, including:

• Online encyclopedias
• Medical encyclopedias
• Patient education
• Medical education
• Software documentation
• Knowledge management
• Research collaboration
• Public health information
• Clinical guideline organization
• Institutional documentation
• Educational technology
• Community knowledge bases

Advantages for healthcare knowledge

Wiki technology is especially useful in healthcare because medical knowledge is interconnected. A single disease may involve anatomy, physiology, pathology, microbiology, pharmacology, diagnosis, treatment, prevention, nutrition, and patient education.

A wiki can connect these topics through links such as:

• Diabetes to insulin, metformin, obesity, kidney disease, and diabetic retinopathy
• Hypertension to blood pressure, stroke, heart failure, and ACE inhibitor
• Periodontitis to gingiva, alveolar bone, periodontology, and diabetes mellitus
• Virology to virus, vaccine, antiviral drug, and public health
• Ketogenic diet to ketosis, low-carbohydrate diet, weight loss, and epilepsy

Limitations of wikis

Wikis also have limitations:

• Content may be incomplete.
• Pages may become outdated.
• Open editing can introduce errors.
• Contributors may vary in expertise.
• Vandalism or spam may occur.
• Medical content may require expert review.
• Users may misinterpret general information as personal advice.
• High-use templates require careful maintenance.

A successful medical wiki needs active maintenance, editorial standards, technical stability, and clear health disclaimers.

History of wiki software

Wiki software began in the software design pattern community. The first wiki, the WikiWikiWeb, was created by Ward Cunningham in 1995 as part of the Portland Pattern Repository. It allowed programmers to collaboratively write and link pages about design patterns.

In the late 1990s and early 2000s, wikis became widely recognized as useful tools for public and private knowledge bases. The wiki model later became central to large collaborative encyclopedia projects such as Wikipedia and specialized knowledge projects such as WikiMD.

Wiki culture

Wiki culture emphasizes collaboration, openness, correction, linking, and incremental improvement. Instead of treating articles as fixed publications, wiki pages are living documents that may improve over time.

Core wiki values include:

• Be bold in improving pages.
• Link related concepts.
• Correct mistakes when found.
• Preserve useful history.
• Collaborate with other editors.
• Improve organization through categories and templates.
• Prefer clear and useful content.
• Build knowledge step by step.

Best practices for WikiMD editors

Editors creating or improving WikiMD pages should:

• Use clear article titles.
• Add a concise opening definition.
• Use proper ==Headings==.
• Add internal links to important terms.
• Use relevant Template:Templates.
• Add appropriate entries at the bottom.
• Add images when useful.
• Use tables for structured comparisons.
• Add redirects for alternate names.
• Avoid promotional or unsupported claims.
• Use patient-friendly language when writing patient education pages.
• Add medical disclaimer templates when appropriate.
• Keep drug and treatment information cautious and current.
• Link to related topics in a ==See also== section.

Example structure for a WikiMD article

A typical WikiMD medical encyclopedia article may use this structure:

{{Medical disclaimer}}
{{Infobox disease
| name =
| symptoms =
| causes =
| diagnosis =
| treatment =
}}

'''Article title''' is a concise definition of the topic.

==Overview==
==Causes==
==Signs and symptoms==
==Diagnosis==
==Treatment==
==Prevention==
==Complications==
==Patient education==
==See also==
==External links==

{{Medicine}}

[[Category:Medicine]]
[[Category:Diseases]]

See also

• WikiMD
• Medical encyclopedia
• Health encyclopedia
• Online encyclopedia
• Collaborative software
• MediaWiki
• Hypertext
• Markup language
• Internal link
• Template
• Category
• Infobox
• Wikipedia
• Wikimedia Commons
• Medical education
• Patient education
• Health informatics
• Knowledge management
• Artificial intelligence in healthcare
• Retrieval-Augmented Generation

Useful links

• WikiMD Main Page
• WikiMD Recent Changes
• WikiMD All Pages
• WikiMD Categories
• WikiMD Statistics
• MediaWiki
• WikiWikiWeb