A: ざくっと知るにはX.509の目次（付録を除く）を見るのがいい。
SECTION 1 – GENERAL
1 Scope
2 Normative references
2.1 Identical Recommendations | International Standards
2.2 Paired Recommendations | International Standards equivalent in technical content
2.3 Other references
3 Definitions
3.1 OSI Reference Model security architecture definitions
3.2 Directory model definitions
3.3 Access control framework definitions
3.4 Definitions
4 Abbreviations
5 Conventions
6 Frameworks overview
6.1 Digital signatures
SECTION 2 – PUBLIC-KEY CERTIFICATE FRAMEWORK
7 Public-keys and public-key certificates
7.1 Generation of key pairs
7.2 Public-key certificate creation
7.3 Certificate Validity
7.4 Repudiation of a digital signing
8 Public-key certificate and CRL extensions
8.1 Policy handling
8.2 Key and policy information extensions
8.3 Subject and issuer information extensions
8.4 Certification path constraint extensions
8.5 Basic CRL extensions
8.6 CRL distribution points and delta-CRL extensions
9 Delta CRL relationship to base
10 Certification path processing procedure
10.1 Path processing inputs
10.2 Path processing outputs
10.3 Path processing variables
10.4 Initialization step
10.5 Certificate processing
11 PKI directory schema
11.1 PKI directory object classes and name forms
11.2 PKI directory attributes
11.3 PKI directory matching rules
SECTION 3 – ATTRIBUTE CERTIFICATE FRAMEWORK
12 Attribute Certificates
12.1 Attribute certificate structure
12.2 Attribute certificate paths
13 Attribute Authority, SOA and Certification Authority relationship
13.1 Privilege in attribute certificates
13.2 Privilege in public-key certificates
14 PMI models
14.1 General model
14.2 Control model
14.3 Delegation model
14.4 Group assignment model
14.5 Roles model
14.6 Recognition of Authority Model
14.7 XML privilege information attribute
14.8 Permission attribute and matching rule
15 Privilege management certificate extensions
15.1 Basic privilege management extensions
15.2 Privilege revocation extensions
15.3 Source of Authority extensions
15.4 Role extensions
15.5 Delegation extensions
15.6 Recognition of Authority Extensions
16 Privilege path processing procedure
16.1 Basic processing procedure
16.2 Role processing procedure
16.3 Delegation processing procedure
17 PMI directory schema
17.1 PMI directory object classes
17.2 PMI Directory attributes
17.3 PMI general directory matching rules
18 Directory authentication
18.1 Simple authentication procedure
18.2 Strong Authentication
19 Access control
20 Protection of Directory operations