Update DTD and XSD documents

Remove %vmeff definition.

Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>

sadf.h

@@ -9,7 +9,7 @@
 #include "sa.h"
 
 /* DTD version for XML output */
-#define XML_DTD_VERSION	"3.14"
+#define XML_DTD_VERSION	"3.15"
 
 /* Various constants */
 enum {

xml/sysstat-3.14.dtd → xml/sysstat-3.15.dtd

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!--DTD v3.14 for sysstat. See sadf.h -->
+<!--DTD v3.15 for sysstat. See sadf.h -->
 
 <!ELEMENT sysstat (sysdata-version, host)>
 <!ATTLIST sysstat
@@ -123,7 +123,7 @@
 	pgscank CDATA #REQUIRED
 	pgscand CDATA #REQUIRED
 	pgsteal CDATA #REQUIRED
-	vmeff-percent CDATA #REQUIRED
+	vmeff-percent CDATA #IMPLIED
 >
 
 <!ELEMENT io (tps, io-reads, io-writes, io-discard?)>

xml/sysstat.xsd

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="https://sysstat.github.io" targetNamespace="https://sysstat.github.io" elementFormDefault="qualified">
 <xs:annotation>
-	<xs:appinfo>-- XML Schema v3.14 for sysstat. See sadf.h --</xs:appinfo>
+	<xs:appinfo>-- XML Schema v3.15 for sysstat. See sadf.h --</xs:appinfo>
 </xs:annotation>
 
 <xs:element name="sysstat" type="sysstat-type"></xs:element>
@@ -225,7 +225,7 @@
 	<xs:attribute name="pgscank" type="hundredth-type" use="required"></xs:attribute>
 	<xs:attribute name="pgscand" type="hundredth-type" use="required"></xs:attribute>
 	<xs:attribute name="pgsteal" type="hundredth-type" use="required"></xs:attribute>
-	<xs:attribute name="vmeff-percent" type="hundredth-type" use="required"></xs:attribute>
+	<xs:attribute name="vmeff-percent" type="hundredth-type"></xs:attribute>
 </xs:complexType>
 
 <xs:element name="io" type="io-type"></xs:element>