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Contents
Preface

Overview
Installation Guide
Quick Start & Tours
Sample ODBC & JDBC Applications
Conceptual Overview
Administration
Data Access Interfaces
SQL Reference
SQL Procedure Language Guide
Database Event Hooks
Data Replication, Synchronization and Transformation Services
Web Application Development
XML Support
RDF Data Access and Data Management
Web Services
Runtime Hosting
Internet Services
Free Text Search
TPC C Benchmark Kit
Using Virtuoso with Tuxedo
Appendix
Virtuoso Functions Guide

CalculateableValue

The type of attribute that contains an expression to be calculated at run time.
Description

The type of a string constant or an expression. If the value of this type is started with '--', the rest of string is the text of an expression to be calculated in order to get the effective value of the property. If the value of this type is not started with '--', the effective value is the original string itself.

The type identifier 'CalculateableValue' is introduced only for diagnostic purposes, you will never use it in VSPX code. When Virtuoso server tries to compile an invalid VSPX page, you might see a diagnostic messages like 'the value of attribute X of a control Y does not match pattern ... for type CalculateableValue'. If you see this then you should check the syntax of the value of the specified attribute.