CDA and XML comparison utility

CDA & Clinical XML Diff Tool

Compare two clinical XML documents structurally, match CDA sections and entries semantically, and review header, narrative, attribute, value, and internal reference changes without uploading the content.

Compare documents Open CDA/XML viewer

Changed
Results / Observation / value
6.2 → 7.4 mmol/L

Added
Results / CRP observation

Changed
Allergies / narrative
rash → rash and swelling

Matched semantically:
- CDA sections
- Structured entries
- Template IDs

Privacy reminder. Do not paste real patient data, credentials, secrets, production identifiers, or confidential documents. Use synthetic or properly de-identified test data only.

Structured comparison

Compare two CDA or clinical XML documents

This tool compares parsed XML structure and applies practical CDA-aware matching. It is not a CDA, schema, template, terminology, or implementation-guide conformance validator.

Original XML

Updated XML

Both documents stay in your browser and are not saved by this tool.

Ignore document effectiveTimeIgnore only the direct ClinicalDocument effectiveTime element. Ignore document IDIgnore only the direct ClinicalDocument id element. Ignore author/authenticator timesIgnore time elements under author and authenticator structures. Match CDA sections semanticallyUse section code, template IDs, or title rather than section order. Match structured entries semanticallyUse statement IDs or codes when stable keys are available. Ignore XML whitespace differencesCollapse text whitespace before comparing values. Case-sensitive comparisonTreat upper- and lower-case text as different. Show unchanged valuesInclude matching attributes and text values in the results.

Additional ignored paths

Separate paths with commas, semicolons, or new lines. Asterisks act as wildcards. Paths are matched against the structured result paths shown below.

Status	Scope	Path	Original	Updated

Text report

Compare two documents to generate a report.

FAQ

CDA and XML comparison questions

Is this a line-by-line XML diff?

No. The tool parses both XML documents, compares elements, attributes, and direct text values, and uses CDA-aware semantic keys for sections and structured entries when possible.

How are reordered CDA sections handled?

With semantic section matching enabled, the tool prefers section code and code system, then template IDs, then title. Reordering the same sections should not create false removed and added section results.

How are structured entries matched?

The tool looks for statement identifiers first and coded statement keys second for common entry types such as observations, substance administrations, procedures, acts, organizers, encounters, and supplies. It falls back to order when stable unique keys are unavailable.

What do the default ignored options do?

They ignore the direct ClinicalDocument document ID and effectiveTime, plus author or authenticator time elements. Encounter effectiveTime and other IDs remain significant unless you explicitly ignore their paths.

Does this validate CDA conformance?

No. It performs structured comparison and practical CDA-aware matching only. It does not validate schemas, templates, terminology, or jurisdiction-specific implementation guides.

Can I paste real patient data?

No. Use synthetic or appropriately de-identified test data only.

CDA & Clinical XML Diff Tool

Compare two CDA or clinical XML documents

Filter by section

Reference changes

Text report

CDA and XML comparison questions