# ISch_Directive interface

An `ISch_Directive` interface represents an object that stores a text string. It is an ancestor interface for the [`ISch_ErrorMarker`](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_ErrorMarker.md) interface. Design constraints (rules) can be defined prior to PCB layout, by adding parameters that are configured as design rule directives to the schematic source document(s).

```csharp
public interface ISch_Directive : ISch_GraphicalObject
```

**Namespace:** SCH · **Assembly:** Altium.SDK.Interfaces

**Inherits:** [ISch_BasicContainer](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md) → [ISch_GraphicalObject](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md)

**Derived:** [ISch_ErrorMarker](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_ErrorMarker.md)

This interface declares no members of its own.

## Inherited members

- From [ISch_GraphicalObject](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md): [AddErrorString](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#adderrorstring), [AreaColor](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#areacolor), [BoundingRectangle](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#boundingrectangle), [BoundingRectangle_Full](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#boundingrectangle_full), [Color](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#color), [CompilationMasked](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#compilationmasked), [Dimmed](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#dimmed), [Disabled](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#disabled), [DisplayError](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#displayerror), [EnableDraw](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#enabledraw), [ErrorColor](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#errorcolor), [ErrorKind](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#errorkind), [ErrorString](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#errorstring), [GetHash](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#gethash), [GraphicallyInvalidate](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#graphicallyinvalidate), [LiveHighlightValue](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#livehighlightvalue), [Location](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#location), [Mirror](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#mirror), [MoveByXY](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#movebyxy), [MoveToXY](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#movetoxy), [OwnerPartDisplayMode](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#ownerpartdisplaymode), [OwnerPartId](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#ownerpartid), [ResetErrorFields](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#reseterrorfields), [RotateBy90](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#rotateby90), [Selection](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#selection), [SetState_xSizeySize](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_GraphicalObject.md#setstate_xsizeysize)
- From [ISch_BasicContainer](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md): [AddAndPositionSchObject](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#addandpositionschobject), [AddSchObject](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#addschobject), [CopyTo](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#copyto), [DeleteAll](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#deleteall), [DescriptionString](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#descriptionstring), [ExportToParameters](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#exporttoparameters), [FreeAllContainedObjects](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#freeallcontainedobjects), [Handle](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#handle), [IdentifierString](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#identifierstring), [Import_FromUser](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#import_fromuser), [ObjectId](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#objectid), [OwnerSchDocument](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#ownerschdocument), [RemoveSchObject](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#removeschobject), [Replicate](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#replicate), [SchBasicContainer](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#schbasiccontainer), [SchIterator_Create](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#schiterator_create), [SchIterator_Destroy](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#schiterator_destroy), [SchParameterByName](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#schparameterbyname), [Setstate_Default](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#setstate_default), [Text](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#text), [UniqueId](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#uniqueid), [WiringDiagramOriginUniqueId](https://altiumdeveloper.github.io/ad-sdk-docs/reference/sch/ISch_BasicContainer.md#wiringdiagramoriginuniqueid)