mashups a combination of overlapping source links or photographic links

6.
Mashups differ from portals in the following respects:

• Portal style: aggregated content is presented 'side-by-side' without overlaps
• Mash-up style"Melting Pot" style - Individual content may be combined in any manner, resulting in arbitrarily structured hybrid content 
• The portal model has been around longer and has had greater investment and product research. Portal technology is therefore more standardised and mature.
• Over time, increasing maturity and standardization of mashup technology may make it more popular than portal technology. 

• New versions of portal products are expected to eventually add mashup support while still supporting legacy portlet applications. Mashup technologies, in contrast, are not expected to provide support for portal standards.