EmbeddedPDV Type

---

The ASN.1 EMBEDDED PDV type is a useful type used to include non-ASN.1 or other data within an ASN.1 encoded message. It was introduced in 1994 to replace EXTERNAL by removing unneeded fields and adding a few new ones to hold information that was missing. This type is described using the following ASN.1 SEQUENCE:

EmbeddedPDV ::=  [UNIVERSAL 11] IMPLICIT SEQUENCE {
 
   identification CHOICE {
 
      syntaxes SEQUENCE {
 
         abstract OBJECT IDENTIFIER,
 
         transfer OBJECT IDENTIFIER },
 
      syntax OBJECT IDENTIFIER,
 
      presentation-context-id INTEGER,
 
      context-negotiation SEQUENCE {
 
         presentation-context-id INTEGER,
 
         transfer-syntax OBJECT IDENTIFIER },
 
      transfer-syntax OBJECT IDENTIFIER,
 
      fixed NULL
 
   },,
 
   data-value OCTET STRING }
 
( WITH COMPONENTS {
 
            ... ,
 
            data-value-descriptor ABSENT } )
 

The ASN.1 compiler is used to create a meta-definition for this structure. The definition will be generated in the file Asn1EmbeddedPDV.cs (or Asn1XerEmbeddedPDV.cs for XER), if needed by compiling ASN.1 files. An object created from the resulting C# class is populated just like any other compiler-generated structure for working with ASN.1 data.