Change schema version to 1.5pre3

VOTable.xsd

@@ -22,15 +22,16 @@
 .Version 1.4pre1: MD: merged 1.3-Erratrum 2, added TIMESYS.
 .Version 1.4wd-a: TD: updates for initial draft of v1.4.
 .Version 1.4: TD: Change version to 1.4
-.Version 1.5pre1: MD: adding refposition attribute
+.Version 1.5pre1: MD: adding refposition attribute and FIELDref/PARAMref
+   in COOSYS, which no longer is derived from xs:string, either.
 .Version 1.5pre2: MD: vocabularising system attribute in COOSYS
-.Version 1.5: TD: Change version to 1.5
+.Version 1.5pre3: TD: Undo the FIELDref/PARAMref addition to COOSYS
 -->
 <xs:schema
    xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified"
    xmlns="http://www.ivoa.net/xml/VOTable/v1.3"
    targetNamespace="http://www.ivoa.net/xml/VOTable/v1.3"
-   version="1.5"
+   version="1.5pre3"
 >
 <xs:annotation><xs:documentation>
     VOTable is meant to serialize tabular documents in the