</p>

<pre>
type Person struct {
	Name    string
	Address *struct {
		Street string
		City   string
	}
}

var data *struct {
	Name    string `json:"name"`
	Address *struct {
		Street string `json:"street"`
		City   string `json:"city"`
	} `json:"address"`
}

var person = (*Person)(data)  // ignoring tags, the underlying types are identical

    <glob pattern="*.msg" />
    <sub-class-of type="application/x-tika-msoffice"/>
  </mime-type>

  <mime-type type="application/vnd.ms-outlook-pst">
    <_comment>Outlook Personal Folders File Format</_comment>
    <magic priority="50">
       <match value="!BDN....SM" type="string" offset="0" mask="0xFFFFFFFF00000000FFFF"/>
    </magic>
    <glob pattern="*.pst"/>