Struct Annotations for XML

When converting between XML and Structs using xmlToStruct or structToXml, you can set and retrieve annotations that provide information that guides the conversion (or reverse conversion).

Use the $tags function to set or get the value of an annotation for a specific Struct. For example:

Get the value of the xmlClass annotation for Struct member div:
```
vClass = MyStruct->div->$tags->xmlClass
```
Set the xmlClass of Struct member div to element:
```
MyStruct->div->$tags->xmlClass = "element"
```

Annotation Tags for XML-Struct Conversions
Tag	Values	Comments
`xmlClass`	`document` `element` `attribute` `process-instruction` `comment` `doctype` `entity-declaration` `element-declaration` `attlist-declaration` `attribute-declaration` `notation-declaration` `namespace-declaration` `CDATA`	XML construct from which, or to which, the Struct member is converted.
`xmlNamespaceURI`	Value of the `namespace` string	URI of the namespace of this element or attribute
`xmlNamespaceAlias`	Value of the `alias` string	Alias (or prefix) used on this element to specify the namespace.
`xmlVersion`	Value of the `version` attribute in the `<?xml … ?>` declaration	On top level Struct only
`xmlEncoding`	Value of the `encoding` attribute in the `<?xml … ?>` declaration	On top level Struct only; optional.
`xmlStandAlone`	Value of the `standalone` attribute in the `<?xml … ?>` declaration	On top level Struct only; optional.
`xmlDataType`	Data type	On Structs for attributes and attribute declarations, unless it is `CDATA`, which is the default. Set on elements, only if `/schema` is specified and the schema has defined a data type for it. Note: During conversion from Struct to XML it is possible to influence the output format by setting `xmlDataType`, unless the schema dictates it.
`xmlTypeNamespace`	Namespace of URI of a schema-defined data type	On attributes and elements when `/schema` is used and the schema has defined the data type with a namespace.
`xmlTypeCategory`	`simple` `complex`	On attributes and elements when `/schema` is used and the data type comes from a schema.
`xmlAttrMode`	`#IMPLIED` `#REQUIRED` `#FIXED`	On Structs for attribute list declarations
`xmlPublicID`	Formal Public Id used to identify the DTD	On Structs for DOCTYPE, entity declarations, and notation declarations
`xmlSystemID`	URI for the file containing the DTD	On Structs for DOCTYPE, entity declarations, and notation declarations
`xmlNotation`	Name of notation declaration	On Structs for unparsed external entity declaration

Namespace declarations also affect the annotations for elements and attributes. For more information, see XML Namespace Declaration.