INTERACTIVE WEB SERVICES WITH JAVA

Constraint Syntax

PowerForms constraints are written in XML syntax and look like:

<powerforms> <constraint field="name"> body </constraint> ... <constraint field="name"> body </constraint> </powerforms>

A body is an expression, a regexp, or looks like:

<ignore/>

or:

<if> expression <then>body</then> <else>body</else> </if>

An expression is a predicate or looks like one of:

<and>expression*</and> <or>expression*</or> <not>expression*</not>

A predicate looks like one of:

<count min="int max="int"/> <equal field="name" value="string"/> <match field="name">regexp</match>

A regexp looks like:

<regexp pattern="regexp"/> <regexp url="URL"/>