#265 PNG schema - additional metadata element in multipage schema

[Allan Cunliffe]

Testing Branch Xena 5.0.0.

I'm currently working on documenting the XML schemas for the various file formats we support. I'm looking at .xena files and deriving a schema from the XML. In this case I am then comparing the derived schemas for png and multipage png.

The derived schema extract for png is:

<xsd:element name="png:png">
<xsd:complexType>
<xsd:attribute name="png:description" type="xsd:string" />
<xsd:attribute name="png:extension" type="xsd:string" />
</xsd:complexType>
</xsd:element>

As part of multipage file, the derived extract includes an additional element of <xsd:element name="png:metadata" type="xsd:string" />:

<xsd:element name="multipage:multipage">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="multipage:page">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="png:png">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="png:metadata" type="xsd:string" />
</xsd:sequence>
<xsd:attribute name="png:description" type="xsd:string" />
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

Should the PNG schema include the <xsd:element name="png:metadata" type="xsd:string" /> element or should the multipage schema have it removed?

[Daniel Black]

i'll look at this as part of xml overview