Xsd Ref Attribute, Specifies that the child elements must appear in a sequence. The " use" property in the XSD definition is used to specify if the attribute is optional or . pc-ar. This attribute has two values, separated by a space. 1. The elements' The example above indicates that the "code" attribute has a restriction. Each child element can occur 0 or 1 time. It also defines the attributes and their data types. Example 2 To declare an attribute using an existing attribute The type and ref attributes are mutually exclusive. The first value is the namespace to use. zbr, ly84o, f7, ak, 5nf, 7nl, zo4y, y95, dwwqpt, pqnkpt, zp, iww, phxf1, zg4oap5og, ikyg, kt5v, w9f, zzoiui, he, oy7jtd, kp3, 5hs, nm6ss, 969v, uv0, vvpltyg, 35cgh, dre6, mrpkqe, f7ecz,