Information Technology Reference
In-Depth Information
Figure 7.7
Service discovery GUI and the result. Search services whose description
contains
array
, hosted by
NCICB
, and annotated with concept code
C44282
.
DataAccess.
caGrid Data Service [189] is used to share cancer
research data. caGrid data services implement an object-oriented
virtualization on top of the backend data source. Based on this
virtualization, data items can be searched by their object classes,
properties, and association relations. caGrid also defines an XML-
based object-oriented query language called caGrid Query Language
(CQL) for the querying purpose. The data access component provides
a GUI to build CQL queries against data services, and users can browse
the data object model graph and build a CQL clause easily without
knowing its syntax.
Another feature offered by the data access component is the data
transfer tool called caGrid transfer. It leverages the caGrid transfer
