X-Series¶

DIRECTORY¶

Information technology - Open Systems Interconnection:

X.500
  The Directory: Overview of concepts, models and services
X.Imp500
  Directory Implementors' Guide
X.501
  The Directory: Models
X.509
  The Directory: Public-key and attribute certificate frameworks
X.510
  The Directory: Protocol specifications for secure operations
X.511
  The Directory: Abstract service definition
X.518
  The Directory: Procedures for distributed operation
X.519
  The Directory: Protocol specifications
X.520
  The Directory: Selected attribute types
X.521
  The Directory: Selected object classes
X.525
  The Directory: Replication
X.530
  The Directory: Use of systems management for administration of the Directory

X.500 定义了一种区别命名规则，以命名树来确保用户名称的唯一性
X.509 则为 X.500 用户名称提供了通信实体鉴别机制，并规定了实体鉴别过程中广泛适用的证书语法和数据接口

ASN.1¶

Information technology - Abstract Syntax Notation One (ASN.1):

X.680
   Specification of basic notation
X.681
   Information object specification
X.682
   Constraint specification
X.683
   Parameterization of ASN.1 specifications

Information technology - ASN.1 encoding rules:

X.690
  Specification of Basic Encoding Rules (BER)
  Canonical Encoding Rules (CER)
  Distinguished Encoding Rules (DER)
X.691
  Specification of Packed Encoding Rules (PER)
X.692
  Specification of Encoding Control Notation (ECN)
X.693
  XML Encoding Rules (XER)
X.694
  Mapping W3C XML schema definitions into ASN.1
X.695
  Registration and application of PER encoding instructions
X.696
  Specification of Octet Encoding Rules (OER)
X.697
  Specification of JavaScript Object Notation Encoding Rules (JER)

参考¶

X Series: https://www.itu.int/rec/T-REC-X/en