SBQL queries addressing imported XML files
Short manual by Kazimierz Subieta
allows you to import any number of XML files to the ODRA store in the M0 store
model (no classes). You can also see the content of a given XML file on a IDE pane. After the import you can ask SBQL queries and
observe their results. The demo contains the following files:
importer is implemented in such a way that no information contained in the
original XML file is lost in its M0 store model representation. In some cases
this assumption implies inconveniencies in asking SBQL queries – they are a bit
more complex. In particular, due to XML attributes each atomic value from an
XML file is wrapped into an object named _VALUE.
This implies that an SBQL reference to such a atomic
value must be ended by dot and _VALUE; see
examples. Note also that XML attributes id and idref are mapped as pointer
links between objects, giving the possibility to use SBQL path expressions.
Getting started (be sure you have installed the Java
- Start IDE by double clicking jOdra2-IDE.jar
- On left you see Workspace(0). Click it by right mouse button and then
select Create a new project.
- On the new window enter the
project name or accept the default name New
- On the new window accept the
default location of the project file or introduce an own location.
- On the left you see New Project 1 (or another project name). Click it
right mouse button and then select Add existing
file. Then navigate to the file deptemp.xml (or to another XML file).
- Double click New Project 1 (or another project name) and then
double click the name of the chosen XML file (e.g. deptemp.xml). The text of the file is
displayed in the central window.
- Choose New
Project 1 by right mouse button and choose Server
<Not connected> by right button and then choose Start default. The ODRA server will be activated
- In the same place choose by the
right button Import data using plugin.
- In the new window you have to
-> XML importer ( be
careful, this is not a default), file name deptemp.xml (or another one) and then
- Press Reload
to load the admin module (the default
module in which the data is created).
- Ask SBQL queries in the window
below and observe the results. They can be copied to clipboard (by right
mouse button) and then pasted to Notepad, Word, etc.