Adding Metadata to Mashups

Metadata declarations allow you to set processing flags or pass other information to applications that will use a mashup, use a macro or handle mashup results. Metadata is stored with mashups in the Presto Repository and can be queried Using the Built-in Mashup Query Web Service.

<emml-meta> for metadata built into EMML. It provides processing flags or other information used by the Presto Server.

<presto:macro-meta> for metadata for macros that is used by Presto. It provides processing flags used by the Presto Server or by mashup composers such as Wires.

Note:

<presto:macro-meta> is a new metadata element that replaces variations of the <presto:presto-meta> element specific to macros.

<presto:presto-meta> for metadata for mashups that is used by Presto. It provides processing flags used by the Presto Server or by mashup composers such as Wires.

<user-meta> to define your own custom metadata. You can use this for flags or any other data you wish to associate with a mashup or a macro. You define the names and content of user metadata to fit your requirements.

Most metadata declarations have a name attribute that identifies the purpose of the metadata. Names for user-defined metadata must:

Start with an ASCII letter and contain only ASCII letters, numbers, dashes (-) or underscores (_). Names are case sensitive.

Metadata declarations can contain a simple value or a complex structure of descendant elements. Simple values for metadata are a string datatype.

For complex structures, descendants can only be your own custom metadata or extensions specifically allowed in <presto:presto-meta> or <presto:macro-meta>. Other EMML statements or declarations are not allowed.

<user-meta name="refresh-seconds">5</user-meta>
<presto:presto-meta name="created-using">Wires</presto:presto-meta>
<presto:macro-meta>
<block usage="Wires">
<help>Returns all open issues for the customer specified as input.</help>
<icon usage="menu" url="http://myOrg.com/icons/myBlockSmall.png"/>
<icon usage="canvas" url="http://myOrg.com/icons/myBlockMed.png"/>
</block>
<parameters>
<parameter name="query">
<label>Customer</label>
<help>Enter part or all of a customer name to find open issues.</help>
<type datatype="text"/>
</parameter>
</parameters>
</presto:macro-meta>