A. Mashup

Mashup is a web page or application that uses and combines data, presentation or functionality from two or  more sources to create new services. 

The term mashup is also used to describe a remix of digital data.

• Have an active role in the evolution of social software and Web 2.0
• Composition tools are usually simple enough to be used by end-users
• Support visual wiring or GUI widgets, services and components together.

B. Characteristics of Mashup 

• Combination 
• Visualization
• Aggregation 

C. Types of Mashup

• Business (or enterprise) mashups

Apps that combine their own resources, application and data with other external web services

• Consumer mashups.

Combines data from multiple public sources in the browser and organizes it through a browser UI

• Data mashups

Combine similar types of media and information from multiple sources into a single representation.

D. Application programming interface (API)

API is a specification intended to be used as an interface by software components to communicate with each other

E. Data API Types

• Indexed data
• Cartographic and geographic data:
• Feeds, podcasts:
• Data converters:
• Communication
• Visual data rendering
• Security related
• Editors

F. Mashup Enabler 

Mashup Enabler is a tool for transforming incompatible IT resources into a form that allows them to be easily combines to create a mashup.

Example:

o Presto Mashup Connectors
o Convertigo Web Integrator
o Caspio Bridge

G. Data Integration Challenges 

• Text-data mismatch
• Object identity and separate schema 
• Abstraction levels
• Data quality