Are multi-language languages unique to the XML family of languages?
Roger L Costello <[email protected]>
| Newsgroups | gmane.text.xml.devel |
|---|---|
| Message-ID | <SA9PR09MB5952390BF49D66AFF0474BB2C8069@SA9PR09MB5952.namprd09.prod.outlook.com> |
Hi Folks, Consider the C language. It is one language. It doesn't use (host) other languages. Consequently, it is relatively straightforward to create a single grammar for the C language. Once the grammar is created, a robust parser can be created. Ditto for every other programming language. Ditto for SQL. Now consider the XML family of languages: XSLT, XML Schema, etc. XSLT uses (hosts) the XPath language. Here is an excerpt to illustrate: select="/Bookstore/Book[1]/Title" The expression /Bookstore/Book[1]/Title is an XPath expression, the other parts are XSLT. So, the format of the "select" is: select="XPath" See how XSLT hosts XPath? That is, one language (XSLT) is using another language (XPath). The XPath language is a pretty large language, with its own grammar. XSLT, independent of XPath, is also a pretty large language, with its own grammar. How to create a single grammar for XSLT that includes XPath? Copy-and-paste the XPath grammar into the XSLT grammar? That is riddled with problems. XML Schema hosts two languages: XPath and Regular Expressions (regexes). Yikes! How to create a single grammar for that? The XML language itself hosts two languages: the DTD language and the namespace language. So, many of the languages in the XML family of languages are multi-language languages. Other than the XML family of languages, are there languages that are multi-language languages? Or, is this a phenomena unique to the XML family of languages? /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: [email protected] subscribe: [email protected] List archive: http://lists.xml.org/archives/xml-dev/ List Guidelines: http://www.oasis-open.org/maillists/guidelines.php