michael@trigraph.UUCP (Michael Winser) (12/30/87)
I am trying to understand how SMGL and ODA can co-exist.
I don't know an awful lot about SGML, but as I see it, SGML is a meta
language for describing a markup language. Also, SGML describes the
structure of a document.
ODA also describes the structure of a document, it also describes much
more.
How can ODA and SGML co-exist, it seems that there is a lot of overlap
between the two standards.
I realize that my questions are probably badly phrased, but if I knew
what to ask, I wouldn't need to ask it!
Is anybody out there using SGML or ODA, heeelllp!
Michael Winser
--
...utscri!trigraph!michael Michael Winser
michael@trigraph.UUCP Trigraph Inc.
5 Lower Sherbourne St. #201
(416) 363-8841 Toronto,Ontario M5R 3H8hrs@homxb.UUCP (H.SILBIGER) (01/07/88)
In article <339@trigraph.UUCP>, michael@trigraph.UUCP (Michael Winser) writes: > > I am trying to understand how SMGL and ODA can co-exist. > I don't know an awful lot about SGML, but as I see it, SGML is a meta > language for describing a markup language. Also, SGML describes the > structurm of a document. > ODA also describes the structure of a document, it also describes much > more. > How can ODA and SGML co-exist, it seems that there is a lot of overlap > between the two standards. > ODA has a standardized architecture. It was designed to be used in an Open Systems environment. SGML does not have a standardized architecture, but can describe any desired architecture. This description has to be known to both parties in an interchange before transfer can take place. Both ODA and SGML can be used to describe the logical structure of a document. Only ODA can be used to describe the layout of a document. The interchange format of ODA is ODIF. It is coded in ASN.1 (X.409), which is also used in many other Open Systems applications. An ODA document can alternatively be described in SGML, which is also described in 8613. The primary area of application of ODA is seen to be the office environment. For SGML it is the publishing environment. The SGML encoding of ODA is seen to be a bridge between the two environments. CCITT has a number of standardized ODA applications, which use ASN.1 ODIF. The CCITT version of ISO 8613, which is totally compatible, is in the 1988 T.400 series. Herman Silbiger ...!ihnp4!homxb!hrs +1 201 949 3193