- added preliminary archive.xsd for <slub:archive /> part

xsd/archive.xsd

+<?xml version="1.0" encoding="UTF-8"?>
+<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" targetNamespace="http://slub-dresden.de" xmlns:archive="http://slub-dresden.de" xmlns:v3="http://www.loc.gov/mods/v3" xmlns:mets="http://www.loc.gov/METS/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink">
+  <xs:import namespace="http://www.loc.gov/METS/" schemaLocation="sip.xsd"/>
+  <xs:import namespace="http://www.loc.gov/mods/v3" schemaLocation="v3.xsd"/>
+  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="xlink.xsd"/>
+  <xs:import namespace="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="xsi.xsd"/>
+  <xs:element name="record">
+    <xs:complexType>
+      <xs:sequence>
+        <xs:element ref="archive:exportToArchiveDate"/>
+        <xs:element ref="archive:externalId"/>
+        <xs:element ref="archive:externalWorkflow"/>
+        <xs:element ref="archive:hasConservationReason"/>
+        <xs:element ref="archive:externalIsilId"/>
+        <xs:element ref="archive:archivalValueDescription"/>
+      </xs:sequence>
+    </xs:complexType>
+  </xs:element>
+  <xs:element name="exportToArchiveDate" type="xs:dateTime"/>
+  <xs:element name="externalId" type="xs:string"/>
+  <xs:element name="externalWorkflow" type="xs:string"/>
+  <xs:element name="hasConservationReason" type="xs:boolean"/>
+  <xs:element name="externalIsilId" type="xs:string"/>
+  <xs:element name="archivalValueDescription" type="xs:string"/>
+</xs:schema>