Where the people are in the age of information revolution, exchange information and transport data effectively among various sectors of government, commercial, service and industrial, etc., the uses of a new databases model to support this trend has become very important because inability of traditional databases models to support it. eXtensible Markup Language (XML) considers a new standard model for data interchange through internet and mobiles devices networks, it has become a common language to exchange and share the data of traditional models in easy and inexpensive ways. In this paper, the authors propose a new technique to convert the relational database contents and schema into XML schema (XSD- XML Schema Definition), the main idea of the technique is extracting relational database catalog using Structured Query Language (SQL).