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Document structure trees

In principle, using a correct document structure is just like setting out a multi level list, with like items grouped beneath each other at the same level. Instead of bullets, we use headings to define the levels.

The brief example below shows the potential problems that can arise with document structure. Notice how much better the correct version looks.

Correct

Heading 1: Fruit

Heading 2: Apples

[paragraph on Apples]

Heading 3: Golden Delicious

[paragraph on Golden Delicious]

Heading 3: Granny Smiths

[paragraph on Granny Smiths]

Heading 2: Pears

[paragraph on Pears]

Heading 3: Conference

[paragraph on Conference]

Heading 2: Oranges

Heading 3: Satsumas

Heading 3: Tangerines

Heading 1: Vegetables!

Incorrect

Heading 1: Fruit

Heading 1: Apples

[ wrong - Apples is logically a 'child' of fruit, so this should be an h2 ]

[paragraph on Apples]

Heading 2: Golden Delicious

[paragraph on Golden Delicious]

Heading 1: My Favourite apple

[ wrong - its 'parent' is an h2, and if this is not a new section, then this should be an h3]

Heading 2: Pears

[paragraph on Pears]

Heading 3: Conference

[paragraph on Conference]

Heading 1: Oranges

Heading 2: Satsumas

Heading 3: Tangerines

[ wrong - 'Tangerines', like 'Satsumas' are both Oranges, so this should be an h3]

Please note: There should only be one Heading 1 on any one page.

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