parameter = CFWS? attribute FWS? "=" FWS? value CFWS?;
ietf_token = token+;
- custom_x_token = 'x' "-" token+;
+ custom_x_token = /x/i "-" token+;
extension_token = ietf_token | custom_x_token;
- disposition_type = 'inline' %Disposition_Inline | 'attachment' %Disposition_Attachment
+ disposition_type = /inline/i %Disposition_Inline | /attachment/i %Disposition_Attachment
| extension_token >Disposition_Start %Disposition_End;
disposition_parm = parameter;
content_disposition = disposition_type (";" disposition_parm)*;