A real world extensions sequence (taken from Google's GAI2).


$ openssl asn1parse -i < [EXTENSIONS]
    0:d=0  hl=3 l= 228 cons: SEQUENCE          
    3:d=1  hl=2 l=  31 cons:  SEQUENCE          
    5:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 Authority Key Identifier
   10:d=2  hl=2 l=  24 prim:   OCTET STRING      [HEX DUMP]:30168014C07A98688D89FBAB05640C117DAA7D65B8CACC4E
   36:d=1  hl=2 l=  29 cons:  SEQUENCE          
   38:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 Subject Key Identifier
   43:d=2  hl=2 l=  22 prim:   OCTET STRING      [HEX DUMP]:04144ADD06161BBCF668B576F581B6BB621ABA5A812F
   67:d=1  hl=2 l=  14 cons:  SEQUENCE          
   69:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 Key Usage
   74:d=2  hl=2 l=   1 prim:   BOOLEAN           :255
   77:d=2  hl=2 l=   4 prim:   OCTET STRING      [HEX DUMP]:03020106
   83:d=1  hl=2 l=  46 cons:  SEQUENCE          
   85:d=2  hl=2 l=   8 prim:   OBJECT            :Authority Information Access
   95:d=2  hl=2 l=  34 prim:   OCTET STRING      [HEX DUMP]:3020301E06082B060105050730018612687474703A2F2F672E73796D63642E636F6D
  131:d=1  hl=2 l=  18 cons:  SEQUENCE          
  133:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 Basic Constraints
  138:d=2  hl=2 l=   1 prim:   BOOLEAN           :255
  141:d=2  hl=2 l=   8 prim:   OCTET STRING      [HEX DUMP]:30060101FF020100
  151:d=1  hl=2 l=  53 cons:  SEQUENCE          
  153:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 CRL Distribution Points
  158:d=2  hl=2 l=  46 prim:   OCTET STRING      [HEX DUMP]:302C302AA028A0268624687474703A2F2F672E73796D63622E636F6D2F63726C732F6774676C6F62616C2E63726C
  206:d=1  hl=2 l=  23 cons:  SEQUENCE          
  208:d=2  hl=2 l=   3 prim:   OBJECT            :X509v3 Certificate Policies
  213:d=2  hl=2 l=  16 prim:   OCTET STRING      [HEX DUMP]:300E300C060A2B06010401D679020501
-----BEGIN EXTENSIONS-----
MIHkMB8GA1UdIwQYMBaAFMB6mGiNifurBWQMEX2qfWW4ysxOMB0GA1UdDgQWBBRK3QYWG7z2aLV
29YG2u2IaulqBLzAOBgNVHQ8BAf8EBAMCAQYwLgYIKwYBBQUHAQEEIjAgMB4GCCsGAQUFBzABhh
JodHRwOi8vZy5zeW1jZC5jb20wEgYDVR0TAQH/BAgwBgEB/wIBADA1BgNVHR8ELjAsMCqgKKAmh
iRodHRwOi8vZy5zeW1jYi5jb20vY3Jscy9ndGdsb2JhbC5jcmwwFwYDVR0gBBAwDjAMBgorBgEE
AdZ5AgUB
-----END EXTENSIONS-----