A text fragment is a fragment whose content is composed of text, and it is a primary component to compose your knowledge in a Piggydb database. The content can be formatted using a wiki-like markup syntax, as shown:

(Clicking the help button [?] shows the Wiki Markup Help.)

Piggydb puts the focus on the logical structure of knowledge rather than presenting information in a visually impressive way. So Piggydb provides just a minimal set of tools for simple formatting such as basic font decorations, lists, quotes, tables, etc. It does not provide a sectional level of text formatting because in Piggydb this is realized not in the content of a fragment, but with relationships among fragments and tags.