GXml and XSD

While on the road to release GXml 0.14, I started to port some of my projects to new GXml.Gom* objects, in order to take advantage on speed and reduced memory footprint.

In the process, my library requires to define a large set of strings to select on for an element’s attribute. This is, PostalCode number. They are defined as XSD enumeration in a SimpleType.

At the begining, I started to define an array to add to GXml.GomArrayString[1], but found they are too many to maintain and error prone.

Then I desired to take a look at W3C Schema Specification and started to define a new GXml.Xsd* interfaces and a new GXml.GomXsd* classes to implement them. The result is: GXml.GomXsdArrayString [1], a new class taking an XSD file, to search a SimpleType definition and parse all enumerations, add them to an array of strings you can choose or validate your property value from.

These are the first steps in the way to get XSD support in GXml. While, GXml.Xsd* interfaces are unstable, and will continue this way after 0.14 release, will open new opportunities to any one consuming XSD definitions.

May be in the future, some one can use this API to create an XSD to Vala (or C) code GObject classes.

May other wants to help adding more object definitions from XSD specification in order to get patterns and other restriction from schema definitions, and improve data handling and validation.

[1] GXml.GomCollections definitions

[2] GXml.Schema definitions and GXml.GomXsd implementations

 

Author: despinosa

Linux and GNOME user, full time, since 2001. Actual maintainer of GXml and contributor to other projects mainly on GObject Introspection support.