# Schema Requirements

## R_SC_SCHEMA_VALIDATION

### Anforderung

| ID | R_SC_SCHEMA_VALIDATION |
| ---- | ---- |
| Description | A basic requirement is that each CityGML document must be well defined and XSD valid. |
| Error code | SC-SCHEMA-NOT-VALID |

### Prüfung

| ID | SC_SCHEMA_VALIDATION|
| ---- | ---- |
| Anforderungs ID | R_SC_SCHEMA_VALIDATION |
| Requirements | none |
| Description | Tools to perform XSD validation are available and give reliable results |
| Error code | SC_SCHEMA_NOT_VALID |