HL7.org: http://www.hl7.org/participate/toolsandresources.cfm
HL7book: http://hl7book.net

HL7 EDI Tools & Resources Directory: http://www.hl7.org.au/HL7-Tools.htm
Corepoint: http://www.corepointhealth.com/products/hl7-analyzer/hl7-analyzer
7Edit: http://www.7edit.com/home/index.php
MDLink: http://www.mdisolutions.com/products/md-link-hl7-integration.html
Interfaceware: http://www.interfaceware.com/?HL7-Tools
HL7 Inspector: http://sourceforge.net/projects/hl7inspector/

HAPI: http://hl7api.sourceforge.net/
nHapi: http://sourceforge.net/projects/nhapi/

CDATools: http://cdatools.org/
Eclipse HL7 CDA Editor Tool: http://hl7book.net/index.php?title=Eclipse_Instance_Editor
JAR for command-line / web site (CDAInstanceValidator): http://hl7book.net/index.php?title=Eclipse_Instance_Editor#JAR_for_command-line_.2F_web_site

XML Schemas liegen im Standard in den Verzeichnissen

• processable\coreschemas
• processable\multicacheschemas

Schemavalidierung kann mit herkömmlichen Tools gemacht werden wie Schema Editoren (z.B. Altova XML Spy oder oXygen) oder in die eigene Software integriert werden (z.B. .Net System.Xml.Schema oder Java JAXP).

ISO/IEC 19757-3
Information technology — Document Schema Definition Languages (DSDL)
Part 3: Rule-based validation — Schematron 

Schematron Validatoren:

IHE Gazelle EVS Client: http://gazelle.ihe.net/EVSClient/
medshare XML Validator: http://ws1.medshare.net/xmlvalidator/
NIST CDA Guideline Validation: http://www.nist.gov/itl/ssd/int/sem-interop.cfm
Lantana CDA Validator: http://www.alschulerassociates.com/validator/

HL7 CDA-CH Supporting Documents: http://www.hl7.ch/publikationen0/cda-templates.html

Open Health Tools: http://www.openhealthtools.org/
Open eHealth Foundation: http://www.openehealth.org