SCHEMA => FORMS
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| Schema Elements and Types | Element/Type Details |
Is this new element a simple or a complex one?
- Simple elements have a single value and have no sub-elements or attributes.
- Complex elements do have sub-elements and/or attributes.
- If just a single value (simple), or even empty, an element becomes complex by having attributes.
Select a data-type for the simple element.
Does this new complex element contain other sub-elements, is it a single value only, is it
empty, or is it a mixture of text and sub-elements?
- Sub-elements may be in a prescribed sequence or allow a choice of sub-elements, each sub-element may itself be simple or complex.
- A single-value , or empty , element becomes complex by having attributes.
- A mixed content element contains just text but within which are other sub-elements.
What ordering arrangement is needed for this
complex
element?
- Sub-elements may occur in a all group from which each sub-element can be present zero or once, in any order
- Sub-elements may occur in a choice group, from which just one sub-element can be present once.
- Sub-elements may be in a sequence group, with each sub-element being absent, present or replicated, in the prescribed order.
Does this new complex type contain other sub-elements, is it a single value only, is it empty,
or is it a mixture of text and sub-elements?
- Sub-elements may be in a prescribed sequence or allow a choice of sub-elements, each sub-element may itself be simple or complex.
- A single-value , or empty , type becomes complex by having attributes.
- A mixed content type contains just text but within which are other sub-elements.
What ordering arrangement is needed for this
complex
element?
- Sub-elements may occur in a all group from which each sub-element can be present zero or once, in any order
- Sub-elements may occur in a choice group, from which just one sub-element can be present once.
- Sub-elements may be in a sequence group, with each sub-element being absent, present or replicated, in the prescribed order.
What ordering arrangement is needed for elements in this group?
- Sub-elements may occur in a all group from which each sub-element can be present zero or once, in any order.
- Sub-elements may occur in a choice group, from which just one sub-element can be present once.
- Sub-elements may be in a sequence group, with each sub-element being absent, present or replicated, in the prescribed order.
Add a new simple element, a new complex element, or a group of elements to this element
sequence?
- Simple elements have a single value and have no sub-elements or attributes.
- Complex elements do have sub-elements and/or attributes.
- If just a single value (simple), or even empty, an element becomes complex by having attributes.
- One use of groups is for creating structure in form layout.
A simple element is added to a sequence by adding an instance of a simple type; either an
standard simple type or a new 'named' type derived from a standard simple type.
- An simple element of standard simple type can be further restricted.
- Creating a named type allows the type to be used more than once.
Creating a new 'named' simple type allows multiple simple elements
of that type to be created, preventing duplication. For example it can be used to create a
list of names or values to use in form selects.
A complex element is added to a sequence by adding an instance of a
complex type. Either a new complex type, or, an existing one.
A group of elements is added to a sequence either by referencing an external 'named' group,
or, by creating an internal 'anonymous' group.
- Named external groups referenced by multiple complex elements avoids duplicated information
- Adding a group does not add another sub-level to the document structure.
Add a group that references an existing named group
Add a group that references a new named group
Add an anonymous internal group
What ordering arrangement is needed for elements in this group?
- Sub-elements may occur in a all group from which each sub-element can be present zero or once, in any order.
- Sub-elements may occur in a choice group, from which just one sub-element can be present once.
- Sub-elements may be in a sequence group, with each sub-element being absent, present or replicated, in the prescribed order.
Does the
simple element (type=
) need to be further restricted in terms of
Do you wish to add an attribute to this complex element/type?
- Attributes are named values attached to an element.
- Attributes are normally used to qualify an element, such as giving it an ID.
- Attributes are uniquely named and occur at most once for an element/type
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