"Life Selector XML" is not a single standard or product. Instead, it refers to using XML as a declarative language to model branching life paths, choices, consequences, and persistent state tracking in interactive experiences.
Advanced versions of these XMLs track "state" (e.g., a character's mood or a score), which determines which ending or secret scene is unlocked later in the playback. life selector xml
A Life Selector XML is inert until processed. Here is a minimal JavaScript (Node.js) parser example using xml2js: Deep Guide: Life Selector XML
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This piece defines a single video scene or "node" in the game flow. Instead, it refers to using XML as a
<lifeStages> <stage id="birth"> <event id="origin"> <description>Where are you born?</description> <options> <option target="childhood_urban"> <text>Born in a bustling city (+5 knowledge, -2 happiness noise)</text> <effect> <modify stat="knowledge" value="+5"/> <modify stat="happiness" value="-2"/> </effect> </option> <option target="childhood_rural"> <text>Raised in the peaceful countryside (+5 health, +3 happiness)</text> <effect> <modify stat="health" value="+5"/> <modify stat="happiness" value="+3"/> </effect> </option> </options> </event> </stage>