2b:null 2c:["$","title",null,{"children":"Life Cycle Ontology | Sam Smith | Observable"}] 31:T469,

Stage	Ages	Description
1	-	Prebirth
2	0	Birth
3	0 - 3	Infancy
4	3 - 6	Early Childhood
5	6 - 8	Middle Childhood
6	9 - 11	Late Childhood
7	12 - 20	Adolescence:
7a	12 - 14	Early
7b	15 - 17	Middle
7c	18 - 20	Late
8	20 - 35	Early Adulthood
9	35 - 50	Midlife
10	50 - 80	Mature Adulthood
11	80+	Late Adulthood
12	-	Death & Dying

32:T57b,## Robert Frost: There are only middles The cut-off dates proposed above are "fuzzy." In Robert Frost's poem "In the Home Stretch" he states that "Ends and beginnings there are no such things. There are only middles." This is true for stage boundaries, but it also highlights the middle of each stage. While the transition between the edges of each stage are indefinite, if one considers the midpoints, there is a substantcial transition between one and the next. These transitions are "canonical" life events in that they apply to all healthy people, with the term **passage** used to reflect a significant or milestone change. Tribal coming of age rituals correspond to passages, as do contemporary rites such as bar and bat mitzvah, child christening, and confirmation in the Catholic tradiiton. Merriam Webster defines passage as *the action or process of passing from one place, condition, or stage to another.* Passages can be significant for a person's life, and working through a passage, especially a negative one, is a process warranting attention. The word **liminality** meaning *of, relating to, or being an intermediae state, phase or condition: IN-BETWEEN, TRANSITIONAL.* Life passage and liminality are a forms of Life Events, and it is proposed that they be recognized as distinct life events in the Life Evenare discussed more fully in the **Life Event Ontology.** 33:[{"id":"00a3f2f74001ac766e2a57dcf8b6d7b8eca4cfaf568c3814fd96895e9ae10dab737c787e00e0b019c26b3994aa0e811de71c2d68fdabb0e878e84da480743f14","href":"https://static.observableusercontent.com/files/00a3f2f74001ac766e2a57dcf8b6d7b8eca4cfaf568c3814fd96895e9ae10dab737c787e00e0b019c26b3994aa0e811de71c2d68fdabb0e878e84da480743f14","name":"LiCyclO_12Stages_Images.jpg","type":"image/jpeg","lastModified":1621204890009.487,"size":80337}] 2f:{"id":"9006cba03ec03ca7","slug":"life-cycle-ontology","title":"Life Cycle Ontology","thumbnail":"cf203ca5127820c42653c2ece3d12353272afc2ab63b5ae500b7d2e2ff550d6d","access_level":"public","create_time":"$D2021-05-16T22:41:28.877Z","update_time":"$D2022-09-29T14:02:47.063Z","view_time":null,"first_public_time":"$D2021-05-20T19:22:05.439Z","fork":false,"stars":1,"starred":false,"owner":{"type":"team","id":"71cc4b7b7d5d9d3b","login":"smithgit","name":"Sam Smith","avatar_url":"https://avatars-next.observableusercontent.com/9229a195929241600a72ca6611a13cdd6eb5c2c3a833ed1f921e2ad7cf4ffbd8","tier":"starter_2024"},"version":73,"publish_version":73,"role":null,"authored":false,"authors":[{"type":"individual","id":"06b4cf3da6c516bf","login":"smithgit","name":"Sam Smith","avatar_url":"https://avatars-next.observableusercontent.com/9229a195929241600a72ca6611a13cdd6eb5c2c3a833ed1f921e2ad7cf4ffbd8","tier":null}],"members":[{"type":"individual","id":"06b4cf3da6c516bf","login":"smithgit","name":"Sam Smith","avatar_url":"https://avatars-next.observableusercontent.com/9229a195929241600a72ca6611a13cdd6eb5c2c3a833ed1f921e2ad7cf4ffbd8","tier":null,"role":"editor"}],"comments":[],"custom_thumbnail":false,"trashed":false,"subscribed":null,"forks":1,"collection":{"id":"bb1bcfc772a8a4fe","slug":"life-ontologies","title":"Life Ontologies","owner":{"id":"71cc4b7b7d5d9d3b","login":"smithgit","name":"Sam Smith"}},"type":"notebook","body":{"title":"Life Cycle Ontology","cells":[{"id":0,"value":"# Life Cycle Ontology \n\n${await FileAttachment(\"LiCyclO_12Stages_Images.jpg\").image()} ","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":6,"value":"## How Many Stages are in a Lifetime? \nHow many stages? it is somewhat arbitrary. Shakespeare's 1599 play *As You Like it* has Jaques, in his \"All the world's a stage\" monologue, declare that there are **seven ages**, a religiously significant number. But this does not allow sufficient granularity. The proposal for this Life Cycle Ontology is derived from two existing references:\n- Dr Thomas Armstrong defines 12 stages in his formulation, but the important developmentat years of adolesence, which he defines as 12-20, could be further refined.\n- The American Academy of Pediatrics defines three stages, early, middle and late, which seem imminently reasonable, so these sub-stages are added to Armstrong's Stage 7. \n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":9,"value":"$31","pinned":false,"hidden":false,"mode":"html","author":"$undefined","summary":"$undefined"},{"id":44,"value":"$32","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":63,"value":"## Plan for Further Development \n### Extend the Discussion of Adult Occupations and Roles \nCharacterizing each stage in the life cycle needs to be done with a degree of consistency, and the suggested plan is to take the terms and definitions employed in characterizing adult occupational and non-occupational roles to the age groups to which occupations do not apply - youth and late adulthood. For instance, activities, abilities and skills will apply to young and old, but not in the same manner as occupational properties.","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"},{"id":67,"value":"## Existing Formal Ontologies Related to Life Cycle \n### Formal Biomedical Ontologies have already been developed for Life Cycles \nThe ontobee.org website describes many existing biomedical ontologies. Non-human life cycle ontologies exist, as well as a human development formal ontology. Not all of these ontologies are based on BFO, but a goal is to be consistent in formulating the Life Ontologies with exsitsing BFO based ontologies. \nThe Human Developmental Stages ontology, with the registered acronym HSAPDV, is an existing formal ontology relevant to Life Ontologies. However, it does not employ BFO, so it does not represent a model to be mirrored in this project. It defines stages of development by week and month for newborns, and then by year for each year thereafter. \n","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined"}],"files":"$W33","stdlib":"1","titling":"auto"}} 30:"$2f:body"