Breaking a paragraph up, and aligning it
A paragraph broken into lines, then laid out four ways: left, right, centred, justified.
Most text in a real document is not one style from end to end. A sentence has a bold term, a total is underlined, a footnote marker is smaller than the words around it. The usual workaround is to cut the sentence into pieces and place each one after the last — which holds until the text is translated and the pieces no longer add up to the same width.
Here the sentence stays one sentence and changes style inside itself, so it can be translated without anybody putting the pieces back in order. A line grows as tall as the tallest thing standing on it, so a big word in a small paragraph opens up its own line and leaves the others alone. And an underline drawn at a fixed distance below the words cuts through the tails of the g and the p in one font and floats miles below them in the next, so here each one is placed where that font says its own underline belongs.
Nothing is left out and nothing is simplified: this is the program exactly as it runs, for the developer who uses this library. The third is the description itself: a plain list of what the page has to say, which is what the service is sent.
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The document is lighter than it was, and every page still looks exactly the same. See this document's row in the table of every example.
A paragraph broken into lines, then laid out four ways: left, right, centred, justified.
A word longer than the column that holds it: the library leaves it whole, or cuts it at the column's edge.
A justified column set twice: the long words breaking at their soft hyphens with a hyphen shown, or left whole, and a figure a no-break space keeps together.
A justified column set twice: file paths and compounds running past the edge with no break points, then wrapping where a break after a slash or a hyphen is allowed.
A title, a rule, two paragraphs, a heading, a table of twenty-six rows and a footnote, handed over in reading order and broken across two pages by the engine.
One line of statuses set twice: in a company font alone, where the characters it has no glyph for come out as empty boxes, then with a second font behind it that draws them.