Given the fact that *standardization efforts, e.g. XPDL [WfMC05_] proposed by
the WfMC, have essentially failed to gain universal acceptance* [WA04_], the
*problem of developing a [workflow system] that supports
changes in the [workflow description language]* needs to be addressed.

.. _WfMC05: http://www.wfmc.org/standards/docs/TC-1025_xpdl_2_2005-09-07_xpdl_2.pdf
.. _WA04: http://www.yawlfoundation.org/documents/yawls.pdf