# C.121 ZSDTValidateTask The `zsdtValidateTask` validates a given Zend package descriptor against the schema file. Table C.155:聽Attributes NameTypeDescriptionDefaultRequired`descriptor``String`The package descriptor file.noneYes`schema``String`The path to the package descriptor schema used for validation.noneNo C.121.1 Example `<zsdtvalidate schema="/path/to/schema.xsl" descriptor="/path/to/descriptor.xml" />`