---
title: "Short note: Tagging and Folksonomies"
subject: "Web Technology"
chapter: 6
key: "semester_7/web_technology:short-note-tagging-folksonomy"
source: https://www.bctengineer.com/q/semester_7/web_technology/short-note-tagging-folksonomy
site: BCT Engineering
---

# Short note: Tagging and Folksonomies

Web Technology · Chapter 6: Web 2.0

- Asked in: 2074 Chaitra, 4 marks
- Video: [Learning 2.0 @ SEMLS - Tagging and Folksonomies](https://www.youtube.com/watch?v=_I8HSrq9sh0) — semlskathy
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_7/web_technology/short-note-tagging-folksonomy
- Whole chapter: https://www.bctengineer.com/md/semester_7/web_technology/chapter-6

## Question

Write a short note on Tagging and Folksonomies.

## Short answer

Tags are user-assigned keywords for organizing content. A folksonomy is a user-generated classification system without a fixed hierarchy, enabling easy discovery and trend visualization via tag clouds.

## Answer

#### Tagging
A **tag** is a keyword or label that a user attaches to an item (photo, web page, video, post) to describe it. Tags let content be organised, searched and shared. Sites such as Flickr, Delicious, YouTube, Twitter (hashtags) and Instagram use tagging. A group of tags shown with size according to popularity is a **tag cloud**.

#### Folksonomy
**Folksonomy** (folk + taxonomy) is a classification system created by the collaborative tagging of users, rather than by experts. There is no fixed vocabulary or hierarchy; the categories emerge from the many tags that people choose.

| Basis | Taxonomy | Folksonomy |
|---|---|---|
| Created by | Experts/administrators | Ordinary users |
| Structure | Fixed hierarchy | Flat, free tags |
| Vocabulary | Controlled | Uncontrolled |
| Cost | High | Low |

#### Advantages
- Easy, cheap and flexible; no training required.
- Reflects the language users actually use and adapts quickly to new terms.
- Helps discovery of related content and trends (tag clouds).

#### Disadvantages
- Ambiguous tags (apple), synonyms (car/automobile), plurals and spelling variations.
- No hierarchy; inconsistent and sometimes spammy tags.

Tagging and folksonomy are central Web 2.0 ideas of collective intelligence.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What is a tag?
   A. A hardware device
   B. A fixed category chosen by experts
   C. A keyword or label a user attaches to an item to describe it
   D. A type of server
   Answer: C. Tags let content be organised, searched and shared. (Key point: Tag)

2. What is a folksonomy?
   A. A classification created by collaborative tagging by users rather than experts
   B. A database index
   C. A type of firewall
   D. An expert-built fixed hierarchy
   Answer: A. Folk + taxonomy: categories emerge from tags people choose. (Key point: Folksonomy)

3. Which comparison is correct?
   A. Taxonomy: fixed hierarchy, controlled vocabulary; folksonomy: flat, free tags
   B. Both created by ordinary users
   C. Both have controlled vocabulary
   D. Taxonomy: free tags; folksonomy: fixed hierarchy
   Answer: A. Taxonomies are expert-made and hierarchical; folksonomies are flat and uncontrolled. (Key point: Taxonomy vs folksonomy)

4. Which is a disadvantage of folksonomy?
   A. Cannot adapt to new terms
   B. Ambiguous tags and synonyms (apple, car/automobile)
   C. Requires training
   D. Very high cost
   Answer: B. Ambiguity, synonyms and inconsistent tags are weaknesses. (Key point: Disadvantage)