DATA PROCESSING, TEXT PROCESSING, INFORMATION INTERCHANGE, DOCUMENTATION,DOCUMENTS, MARKUP, SGML, ARTIFICIAL LANGUAGES, PROCESSING LANGUAGES
被代替标准
2014-04-09
适用范围
The international community has decided to make this standard available only in
the English language version. It has been adopted as a National Standard of
Canada on this basis. This National Standard of Canada is equivalent to International Standard
ISO/IEC 10179:1996. 1 Scope This International Standard is designed to specify the processing of valid SGMl
documents. DSSSL defines the semantics, syntax, and processing model of two languages for
the specification of document processing: a) The transformation language for transforming SGML documents marked up in
accordance with one or more DTDs into other SGML documents marked up in
accordance with other DTDs. The specification of this transformation
process is fully defined by this International Standard. b) The style language, where the result is achieved by applying a set of
formatting characteristics to portions of the data, and the specification
is, therefore, as precise as the application requires, leaving some
formatting decisions, such as line-end and column-end decisions, to the
composition and layout process. The DSSSL style language is intended to be used in a wide variety of
environments with typographic requirements ranging from simple single-column
layouts to complex multiple-column layouts. This International Standard does
not standardize a formatter nor does it standardize composition or other
processing algorithms. Rather, it provides the means whereby an implementation
may externalize 'style characteristics' and other techniques for associating
style information with an SGML document. DSSSL provides a mechanism for specifying the use of 'external processes' to
manipulate data. The nature of these processes is outside the scope of DSSSL,
but may include typical data management functions, such as sorting and
indexing; typical composition functions, such as hyphenation algorithms; and
graphics or multimedia processes for non-SGML data. Documents that have already been formatted or do not contain any hierarchical
structural information or generic markup are not within the field of
application of this International Standard. DSSSL expresses specifications to be performed by some processor that accepts
an input document and produces an output document. DSSSL is independent of the
type of formatter, formatting system, or other transformation processor. DSSSL includes a) Constructs that provide access to, and control of, all possible marked-up
information in an SGML document, as well as mechanisms for string processing to
allow for the manipulation of non-marked up data. This is provided by the
Standard Document Query Language (SDQL) component of DSSSL. NOTE 1 String processing is necessary so that no special 'markers' need be
embedded in the source document to indicate presentational changes. The
display of a dropped or raised capital letter in a larger point size at the
beginning of a line or paragraph is an example of a case where string
processing may be used to isolate the first character or group of characters in
order to achieve a desired presentational effect. b) Provisions for specifying the relationship between one or more SGMl
documents as input to a transformation process and zero or more resulting SGMl
documents as the output of the process. c) Provisions for specifying the relationships between the SGML document(s), as
expressed in the source Document Type Definition(s), and the result of the
formatting process. The output of the formatting process may be an ISO/IEc
10180 Standard Page Description Language (SPDL) document or it may be a
document in some other, possibly proprietary, form. d) Provisions for describing the typographic style and layout of a document. e) Definitions of a machine-processable syntax for the representation of a
DSSSL specification and its various components. f) Provisions for creating new DSSSL characteristics and their associated
values, as well as new flow object classes. These are declared in the
declarations for the style language portion of the DSSSL specification. Thi