Crowdsourcing

1. Media Types

1.1. Text

1.2. Images

1.3. Video

1.4. Sound

2. Tools

2.1. Web 2.0 services

2.1.1. Librarything

2.1.2. Flickr : The Commons

2.1.3. Delicious

2.2. Human Computation Games

2.2.1. GWAP

2.2.2. Facebook Game

2.2.3. Typology of games

3. Purpose

3.1. Generating metadata

3.1.1. Tags (Subject headings)

3.1.2. Relations (for example RDF)

3.1.3. Evaluations(5-stars or reviews)

3.1.4. Descriptive Metadata (Abstracts)

3.2. Cost efficiency

3.3. User involvement

3.4. Embracing new technologies

4. Data collection

4.1. OAI-PMH

4.2. Flickr-API

4.3. Facebook Harvest

5. Analysis

5.1. Thesaural Term Comparison

5.2. Statistical evaluation

5.2.1. Statistical Significance

5.2.2. Measuring the tools

5.3. Tag analysis

6. Theory

6.1. Indexing

6.1.1. Image indexing

6.1.1.1. Aboutness of a image

6.1.1.2. Specificity and abstractness

6.1.2. Inter/Intra indexer inconsistency

6.1.3. Purpose of indexing

6.1.3.1. Epistemological potential

6.1.3.2. Retrieval

6.1.3.3. Personal Information Management

6.2. Folksonomies

6.2.1. Controlled vs uncontrolled vocabularies

6.2.2. Tags vs Subject headings