Update README.md

README.md

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 # YAWL (Yet Another Workflow Language)
 
-YAWL(yawlfoundation.github.io) is a BPM/Workflow system, based on a concise and powerful modelling language, that handles complex data transformations, and full integration with organizational resources and external Web Services. 
+[YAWL](https://yawlfoundation.github.io) is a BPM/Workflow system, based on a concise and powerful modelling language, that handles complex data transformations, and full integration with organizational resources and external Web Services. 
 
 ### Major Features
 YAWL offers these distinctive features:
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 * The YAWL environments supports the automated generation of forms. This is particularly useful for rapid prototyping purposes.
 * Tasks in YAWL can be mapped to human participants, Web Services, external applications or to Java classes.
 * Through the C-YAWL approach a theory has been developed for the configuration of YAWL models. For more information on process configuration visit [www.processconfiguration.com]
-* Simulation support is offered through a link with the [ProM](www.processmining.org) environment. Through this environment it is also possible to conduct post-execution analysis of YAWL processes (e.g. in order to identify bottlenecks).
+* Simulation support is offered through a link with the [ProM](https://www.processmining.org) environment. Through this environment it is also possible to conduct post-execution analysis of YAWL processes (e.g. in order to identify bottlenecks).
 
 ### Other Features
 * new: completely rewritten Process Editor