# PdfTrustServiceTypes class

> The service type identifiers of ETSI TS 119 612 (5.5.1.1) that qualification uses.

Namespace: [PdfNetStack.Signing](https://www.jadev-corp.com/api/pdfnetstack-signing/)  
Assembly: PdfNetStack.dll  
Package: `PdfNetStack`

The service type identifiers of ETSI TS 119 612 (5.5.1.1) that qualification uses.

```csharp
public static class PdfTrustServiceTypes
```

**Inheritance**

[object](https://learn.microsoft.com/dotnet/api/system.object) ← 
[PdfTrustServiceTypes](https://www.jadev-corp.com/api/pdfnetstack-signing/pdftrustservicetypes/)

## Fields

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_CaPkc"></a> CaPkc

A certification authority issuing public key certificates that are not qualified.

```csharp
public const string CaPkc = "http://uri.etsi.org/TrstSvc/Svctype/CA/PKC"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_CaQc"></a> CaQc

A certification authority issuing qualified certificates.

```csharp
public const string CaQc = "http://uri.etsi.org/TrstSvc/Svctype/CA/QC"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_CrlQc"></a> CrlQc

CRLs for qualified certificates.

```csharp
public const string CrlQc = "http://uri.etsi.org/TrstSvc/Svctype/Certstatus/CRL/QC"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_OcspQc"></a> OcspQc

An OCSP responder for qualified certificates.

```csharp
public const string OcspQc = "http://uri.etsi.org/TrstSvc/Svctype/Certstatus/OCSP/QC"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_Tsa"></a> Tsa

A time stamp service that is not qualified.

```csharp
public const string Tsa = "http://uri.etsi.org/TrstSvc/Svctype/TSA"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

### <a id="PdfNetStack_Signing_PdfTrustServiceTypes_TsaQtst"></a> TsaQtst

A qualified electronic time stamp service.

```csharp
public const string TsaQtst = "http://uri.etsi.org/TrstSvc/Svctype/TSA/QTST"
```

#### Field Value

 [string](https://learn.microsoft.com/dotnet/api/system.string)

Source: https://www.jadev-corp.com/pdfnetstack/api/pdfnetstack-signing/pdftrustservicetypes/