[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: How to create an XML language that is the intersection of
There is of course a vast body of theory on this question. See for example the bibliography in http://tocl.acm.org/accepted/401neven.pdf I don't claim to understand a tenth of it. Michael Kay Saxonica On 30 Dec 2013, at 22:00, Costello, Roger L. <costello@mitre.org> wrote: > Hi Folks, > > Suppose person #1 creates an XML language for Books: > > <xs:element name="Books"> > ... > </xs:element> > > Person #2 creates an XML language for Magazines: > > <xs:element name="Magazines"> > ... > </xs:element> > > Now, person #3 can reuse them to create an XML language that is the union of Books and Magazines: > > <xs:element name="BookStore"> > <xs:complexType> > <xs:choice> > <xs:element ref="Books" /> > <xs:element ref="Magazines" /> > </xs:choice> > </xs:complexType> > </xs:element> > > Neat! We can create an XML language that is the union of two XML languages, without any changes to them. > > What about intersection, can we create an XML language that is the intersection of two XML languages? > > Suppose person #4 creates an XML language consisting of a mixture of an arbitrary number of <A> and <B> elements: > > <xs:group name="As-and-Bs"> > <xs:sequence maxOccurs="unbounded"> > <xs:element name="A" minOccurs="0"> ... </xs:element> > <xs:element name="B" minOccurs="0"> ... </xs:element> > </xs:sequence> > </xs:group> > > Person #5 creates an XML language consisting of a mixture of an arbitrary number of <B> and <C> elements: > > <xs:group name="Bs-and-Cs"> > <xs:sequence maxOccurs="unbounded"> > <xs:element name="B" minOccurs="0"> ... </xs:element> > <xs:element name="C" minOccurs="0"> ... </xs:element> > </xs:sequence> > </xs:group> > > Now, person #6 wants to reuse them to create an XML language that is the intersection of the two languages. > > How would person #6 create this intersection language (without any change to the As-and-Bs language or the Bs-and-Cs language)? > > /Roger > > > > > > _______________________________________________________________________ > > XML-DEV is a publicly archived, unmoderated list hosted by OASIS > to support XML implementation and development. To minimize > spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@lists.xml.org > subscribe: xml-dev-subscribe@lists.xml.org > List archive: http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php
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