Your job will be to express this document structure and set of rules in terms of the XML Schema language and validate the instance $($XML$)$ document based on the schema you create.

Complete the following:

$1.$ Using your XML editor, open the catalogtxt.xml and catalogtxt.xsd files located below, enter your name and today$$s date in the comment section of each file, and then save the files as catalog.xml and catalog.xsd$,$ respectively.

$2.$ Go to the catalog.xsd file in your text editor. Add the root schema element to the document and declare the XML Schema namespace using the xs prefix.

$3.$ Attach the schema file catalog.xsd to the instance document, indicating that the schema and instance document do not belong to any namespace.

$4.$ Create the following named simple type:

cidType, based on the ID data type and restricted to the regular expression pattern c$\backslash$d$\{4\}$

$5.$ Declare the catalog element containing the child element photo. The photo element must occur at least once, but its upper limit is unbounded.

$6.$ Declare the photo element containing the following sequence of nested child elements$$name$,$ description and date. Set the following properties for the nested elements:

a$.$ All of the child elements should contain string data. The name element should also support the metadata attribute.

b$.$ The cid attribute is required. The donatedBy attribute is optional.

$7.$ Declare the following attributes and elements:

a$.$ The attribute metadata must have the string data type.

b$.$ The attribute cid must have the cidType data type.

c$.$The attribute donatedBy must have the string data type.

d$.$The element description must have the string data type.

e$.$The element date must have the string data type.

$8.$ Save your changes to the catalog.xsd file, and then validate the schema. Continue to correct any validation errors you discover until the schema validates.

$9.$ Validate the catalog.xml file against the schema. Continue to correct any validation errors you discover until the instance document validates.