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Diffstat (limited to 'lib/asn1/src/Restrictions.txt')
| -rw-r--r-- | lib/asn1/src/Restrictions.txt | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/lib/asn1/src/Restrictions.txt b/lib/asn1/src/Restrictions.txt new file mode 100644 index 0000000000..73b725245d --- /dev/null +++ b/lib/asn1/src/Restrictions.txt @@ -0,0 +1,55 @@ +The following restrictions apply to this implementation of the ASN.1 compiler: + +Supported encoding rules are: +BER +PER (aligned) + +PER (unaligned) IS NOT SUPPORTED + +Supported types are: + +INTEGER +BOOLEAN +ENUMERATION +SEQUENCE +SEQUENCE OF +SET +SET OF +CHOICE +OBJECT IDENTIFIER +RestrictedCharacterStringTypes +UnrestrictedCharacterStringTypes + + +NOT SUPPORTED types are: +ANY IS (IS NOT IN THE STANDARD ANY MORE) +ANY DEFINED BY (IS NOT IN THE STANDARD ANY MORE) +EXTERNAL +EMBEDDED-PDV +REAL + +The support for value definitions in the ASN.1 notation is very limited. + +The support for constraints is limited to: +SizeConstraint SIZE(X) +SingleValue (1) +ValueRange (X..Y) +PermittedAlpabet FROM + +The only supported value-notation for SEQUENCE and SET in Erlang is +the record variant. +The list notation with named components used by the old ASN.1 compiler +was supported in the first versions of this compiler both are no longer +supported. + +The decode functions always return a symbolic value if they can. + + +Files with ASN.1 source must have a suffix .asn1 the suffix .py used by the +old ASN.1 compiler is supported in this version but will not be supported in the future. + +Generated files: +X.asn1db % the intermediate format of a compiled ASN.1 module +X.hrl % generated Erlang include file for module X +X.erl % generated Erlang module with encode decode functions for + % ASN.1 module X |