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4.2 Mapping throughout the RIF-FLD Presentation Sentence structure on XML Syntax
Note that if D requires the directive Dialect(D) as part of its syntax then this implies that any D-admissible document must have this directive. ?
A spherical-stumbling from a keen admissible document inside the a good dialect, D, try a great semantics-retaining mapping so you’re able to a file in any vocabulary L followed closely by an effective semantics-preserving mapping throughout the L-file back once again to an enthusiastic admissible D-file. If you’re semantically similar, the initial together with round-set off D-records doesn’t have to be the same.
cuatro.step one XML towards the RIF-FLD Language
RIF-FLD spends [XML1.0] for its XML sentence structure. New XML serialization to possess RIF-FLD try changing otherwise totally striped [ANF01]. A fully striped serialization feedback XML documents just like the things and divides all of the XML labels on the class descriptors, called sort of labels, and you may possessions descriptors, titled role labels [TRT03]. I follow the community of utilizing capitalized names for style of labels and you may lowercase names getting role labels.
The all-uppercase classes in the EBNF of the presentation syntax, such as Algorithm, become XML Schema groups in Appendix XML Schema for FLD. They are not visible in instance markup. The other classes as well as non-terminals and symbols https://datingranking.net/arablounge-review/ (such as Can be found or =) become XML elements with optional attributes, as shown below.
To own capacity for reference, the original algorithms are included above
The RIF serialization framework for the syntax of Section EBNF Grammar for the Presentation Syntax of RIF-FLD uses the following XML tags. While there is a RIF-FLD element tag for the Import directive and an attribute for the Dialect directive, there are none for the Ft and Prefix directives: they are handled as discussed in Section Mapping from the RIF-FLD Presentation Syntax to the XML Syntax.
The name off good prefix is not associated with an enthusiastic XML ability, because it is addressed via preprocessing due to the fact discussed inside the Area Mapping of one’s Low-annotated RIF-FLD Language.
The id and meta elements, which are expansions of the IRIMETA element, can occur optionally as the initial children of any Class element.
The XML syntax for symbol spaces uses the type attribute associated with the XML element Const. For instance, a literal in the xs:dateTime datatype is represented as
The xml:lang attribute, as defined by 2.12 Language Identification of XML 1.0 or its successor specifications in the W3C recommendation track, is optionally used to identify the language for the presentation of the Const to the user. It is allowed only in association with constants of the type rdf:plainLiteral. A compliant implementation MUST ignore the xml:lang attribute if the type of the Const is not rdf:plainLiteral.
This situation shows a keen XML serialization toward algorithms in Analogy step three. To have best readability, i again make use of the shortcut sentence structure discussed when you look at the [RIF-DTB].
This section defines a normative mapping, ?fld, from the presentation syntax of Section EBNF Grammar for the Presentation Syntax of RIF-FLD to the XML syntax of RIF-FLD. The mapping is given via tables where each row specifies the mapping of a particular syntactic pattern in the presentation syntax. These patterns appear in the first column of the tables and the bold-italic symbols represent metavariables. The second column represents the corresponding XML patterns, which may contain applications of the mapping ?fld to these metavariables. When an expression ?fld(metavar) occurs in an XML pattern in the right column of a translation table, it should be understood as a recursive application of ?fld to the presentation syntax represented by the metavariable. The XML syntax result of such an application is substituted for the expression ?fld(metavar). A sequence of terms containing metavariables with subscripts is indicated by an ellipsis. A metavariable or a well-formed XML subelement is marked as optional by appending a bold-italic question mark, ?, to its right.