XML structure definition:

root tag - <projects>
it has a number of nested <project> tags.

tag <project> has 3 mandatory attributes: id (string), name (string), startdate(formatted string YYYY,MM,DD as in 2006,12,14)

 <project id = "1" name = "project1" startdate = "2006,12,14">

it has a number of nested <task> tags.

tag <task> has one mandatory attribute id (string)

 <task id="1">

and a number of nested tag-properties:

<name>task1</name>     - task name, string

<est>2006,12,14</est>  - task start date, formatted string YYYY,MM,DD

<duration>120</duration> - task duration in hours

<percentcompleted>60</percentcompleted> - percent complete of this task, integer range 0..100

<predecessortasks>2</predecessortasks> - id of the predecessor task (the one linked to this task with an arrow), so this task runs always after its predecessor. Could be empty tag.

<childtasks>

 ... nested <task> tags

</childtasks>   - defines nested sub-tasks, could be empty tag.

End of XML definition.

Sample XML structure - see "data/data.xml" file.