A schema, in general, is intended to be used to check a document for errors before those errors cause problems in processing. However, schemas can also help us write our documents. The TEI ODD language (and the more modern version thereof, Pure ODD), in particular, can be used for two related but distinctly dierent purposes: 1) to create a markup language, including documentation and schemas; and 2) to customize a markup language that was already written in ODD. There are several examples of (1), including the TEI Guidelines, the Music Encoding Initiative, the ISO Feature Structure encoding system, and the W3C Internationalization Tag Set. And there are several well known examples of (2), including TEI Lite, TEI Tite, TEI Simple Print, Comic Book Markup Language, Digital Humanities Quarterly, TEI-in-Libraries, and the markup language for this journal. 1 Of all these various uses of the TEI ODD language, the most common (by far) is to create a customized TEI for use in a particular project. This is because the TEI Guidelines are not meant to be used out of the box-every TEI project is expected to customize the TEI. For example, in raw
This paper is an introduction to the Remote Trunk Arrangement feature of the Traffic Service Position System. The design permits the tsps trunk circuit, which connects the subscriber to the operator, to be located in a distant, rural location. All the logic, records, control, and centralized access to the operators remains at the base unit. The Remote Trunk Arrangement is controlled over a data link and up to eight rta subsystems can be extended from a single tsps base unit. The addition of the rta feature, expansion of the geographical area served by tsps, and the necessity for handling special operator service traffic, affected several tsps design parameters and required the addition of several new features. These supporting features and the operational characteristics and design aims of rta are described.
At the WWP, end-of-line hyphens used by the typesetter to indicate “I ran out of room, so the rest of this word is continued on the next line” are encoded (somewhat problematically) with SOFT HYPHEN (U+00AD). Resolving those so that individual words that were split over a line break are reconstituted turns out to be very difficult. (At least, using XSLT.)
Where should attribute constraints live? In an external schema? In the document’s own metadata? In a separate file? Several possibilities are examined, raising lots of questions and offering a few answers.
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