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[helm.git] / helm / DEVEL / pxp / pxp / examples / xmlforms / README

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------------------------------------------------------------------------------
-xmlforms
------------------------------------------------------------------------------
-
-THE IDEA:
-
-This example uses XML for two purposes:
-
-- The "story" and layout of the application is specified in XML
-- The data records are stored in XML
-
-An "application" is a set of "masks" or sequences of masks, and every mask
-is thought as a visible page of the application, containing layout
-elements and functional elements. Layout is specified in TeX-style using
-hboxes, vboxes, hspaces, vspaces. Functional elements are "entries" (input
-box for a string with one line), "textboxes" (input boxes with several
-lines), and buttons.
-
-See styles/ds-style.dtd for the DTD of an application specification, and
-the other xml files in this directory for examples.
-
-The entries and textboxes are bound to "slots", i.e. string variables. If
-the application is started, the slots are read from a file, and if the
-user presses a special "save" button, the slots are stored into this file.
-The format of this data file is again XML; the simplistic DTD can be found
-in styles/ds-object.dtd.
-
-
-THE IMPLEMENTATION:
-
-There is currently a mapping of the specifications to ocamltk, done by a
-program called "xmlforms".
-
-
-HOW TO COMPILE:
-
-It is assumed that "findlib" is present on your system; see ABOUT-FINDLIB
-in the toplevel directory.
-The "markup" module must have been installed.
-
-- "make xmlforms" produces a bytecode executable "xmlforms"
-- "make xmlforms.opt" produces a native executable "xmlforms.opt"
-
-Note that you cannot start the executables directly:
-
-
-HOW TO START AN APPLICATION:
-
-As "xmlforms" is a generic executable, there is a simple mechanism to bind
-it to a specific instance of an application. For example, in the "styles"
-subdirectory there is the application specification "crazy-style.xml". To
-start it, make a symlink called "crazy" referring to the "xmlforms"
-binary, set the environment variable DATASHEETS to the directory where the
-DTDs and XML files can be found, and start "crazy":
-
-       ln -s ../xmlforms crazy
-       DATASHEETS=. crazy my-record.xml
-
-(If you do not set DATASHEETS, a default directory, normally
-"/opt/xmlforms/lib" is used.)
-