+//! \ingroup Validators
+//! A class to validate a selection for Horizontal and Vertical constraints operation
+class PartSet_HVDirSelection : public ModuleBase_SelectionValidator
+{
+ public:
+ PARTSET_EXPORT virtual bool isValid(const ModuleBase_ISelection* theSelection) const;
+};
+
+//! \ingroup Validators
+//! A class to validate a selection for Tangential constraints operation
+class PartSet_TangentSelection : public ModuleBase_SelectionValidator
+{
+ public:
+ PARTSET_EXPORT virtual bool isValid(const ModuleBase_ISelection* theSelection) const;
+};
+
+//! \ingroup Validators
+//! A class to validate a selection for Fillet constraints operation
+class PartSet_FilletSelection : public ModuleBase_SelectionValidator
+{
+ public:
+ PARTSET_EXPORT virtual bool isValid(const ModuleBase_ISelection* theSelection) const;
+};
+
+////////////// Attribute validators ////////////////
+
+