A <script> element (spec 5.8): a predicator statement program body, run for its side effects on the datamodel (ADR-0026) - not an expression-bearing node like <log>/<content>, and compiled through Statifier.Compiler.Expressions.compile_program/3 rather than compile/3. Legal both as executable content (<onentry>, <onexit>, a transition, an <if> branch, a <foreach> body) and, spec 5.8, as a direct child of <scxml>, evaluated at document load time - Statifier.Lowering.Builders.place/3 sorts the two by parent.

text is Statifier.Parser.DOM.text/1's verbatim, untrimmed concatenation of <script>'s direct text children (verbatim except for the parser's XML 1.0 2.11 line-break fold - ADR-0045) - the program source predicator compiles, mirroring Statifier.Document.Assign.text and Statifier.Document.Data.text.

location is this element's own Statifier.Parser.Location span, the plain name every Document node but Statifier.Document.Assign uses for it: <script> carries no spec attribute named location (unlike <assign>'s own location attribute, the reason Assign renames its own span field to node_location), so there is no competing meaning for this name to collide with here.

src is the raw src attribute value, nilable - carried here only so Statifier.Lowering.Builders.build_script/2 can report a written one as {:unsupported_attribute, "script", "src"} (ADR-0026 decision 2: no external fetch, ever) before any struct is built; no %Script{} this engine's lowering actually produces ever has a non-nil src, because a written src short-circuits the build entirely.