# Web graph and sub-graphs

## A web graph

The webgraph describes the directed links between pages of the World Wide Web. A graph, in general, consists of several vertices, some pairs connected by edges. In a directed graph, edges are directed lines or arcs. The webgraph is a directed graph, whose vertices correspond to the pages of the WWW, and a directed edge connects page X to page Y if there exists a hyperlink on page X, referring to page Y.^{[2]}

## A sub graph

A graph whose vertices and edges are subsets of another graph.^{[3]}

## Do you understand this?

## Standards

These standards are used from the IB Computer Science Subject Guide^{[4]}

- OutlineGive a brief account. the difference between the web graph and sub-graphs.

## References

- ↑ http://www.flaticon.com/
- ↑ https://en.wikipedia.org/wiki/Webgraph
- ↑ Paul E. Black and Alen Lovrencic, "subgraph", in Dictionary of Algorithms and Data Structures [online], Vreda Pieterse and Paul E. Black, eds. 17 December 2004. (accessed 19 January 2018) Available from: https://www.nist.gov/dads/HTML/subgraph.html
- ↑ IB Diploma Programme Computer science guide (first examinations 2014). Cardiff, Wales, United Kingdom: International Baccalaureate Organization. January 2012.