<elementname> Element content goes here </elementname>
The ModelTools schema uses all lower case element names (but element names are case sensitive). Attributes and namespaces are not used, so this is not a complicated schema.
The content of an element may be ordinary text and/or child elements.
Elements with no content and no child elements are called empty elements and are represented by a single tag that closes with a forward slash. For example
Comments in XML begin with <!-- and end with -->. Any text may be placed between these two markers (including angle brackets). For example
<!-- This is a comment. -->
The parsers used in ModelTools ignore all text in a file appearing before the start of the first element and after the end of the last element.