Timeline for Database schema documentation for the public data dump and SEDE
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
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| Jul 10, 2023 at 3:28 | comment | added | leerssej | @paperskilltrees Ah! Now I understand your question: what is the difference between the dashed lines and the solid lines? Thank you for the clarification! Maybe this stackoverflow.com/a/16697896/5088194 or this can help stackoverflow.com/a/16676282 | |
| Jul 7, 2023 at 23:32 | comment | added | paperskilltrees | On the other hand, this shows that dashed (non-solid) line indicates something on top of those symbols; something related to identifying or non-identifying relationships. This variety of notations and possibilities make the topic confusing for a non-expert, and it would be great to know at least something with certainty. [3/3] | |
| Jul 7, 2023 at 23:32 | comment | added | paperskilltrees | You seem to imply that dashing is an indicator of cardinality and should be considered together with the end symbols. This agrees with dbSchema documentation, although it does not show exactly the same notation you used in the picture (you have "P", "Z", or "1" at the ends; the docs show Crow's foot and notches). ... [2/3] | |
| Jul 7, 2023 at 23:32 | comment | added | paperskilltrees | @leerssej Thanks, however the linked answer does not explicitly mention a line being solid or dashed: "ER Diagrams were originally used only to represent the ER model. The ER model does not use foreign keys to represent relationships. It uses lines between boxes. The lines have some kind of indicator for cardinality at either end or both ends. Sometimes, a relationship will be indicated separately by a diamond." What is confusing to me is whether dashing conveys additional information to symbols at the ends of a line or not. ... [1/n] | |
| Jul 7, 2023 at 22:03 | comment | added | leerssej | @paperskilltrees Please see the third sentence in the first response. Link here: dba.stackexchange.com/a/76547/109673 | |
| Jul 4, 2023 at 0:26 | comment | added | paperskilltrees | @leerssej It is not explained in the provided reference what the dashed/solid line styles stand for. At least I couldn't find this. | |
| Jan 3, 2021 at 15:13 | comment | added | leerssej | for further information about ERD key relationship representations (and the start of a path down into the UML structure and format hole) please see here: dba.stackexchange.com/questions/76532/… | |
| Jan 2, 2021 at 10:29 | comment | added | QHarr | It could use a key. For example, what are the dashed lines for? | |
| Jun 24, 2019 at 5:02 | history | edited | leerssej | CC BY-SA 4.0 |
added 18 characters in body
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| Apr 26, 2019 at 18:00 | history | edited | leerssej | CC BY-SA 4.0 |
pares down text and cleans up formatting
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| Apr 26, 2019 at 17:49 | history | edited | leerssej | CC BY-SA 4.0 |
added explicit source of data model information
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| Apr 5, 2019 at 17:34 | history | edited | leerssej | CC BY-SA 4.0 |
added 90 characters in body
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| Apr 5, 2019 at 15:09 | history | edited | leerssej | CC BY-SA 4.0 |
adding note of confirmation
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| Apr 5, 2019 at 14:57 | history | edited | leerssej | CC BY-SA 4.0 |
repetition cleaning
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| Apr 5, 2019 at 0:40 | review | Low quality posts | |||
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| Apr 5, 2019 at 0:38 | history | edited | Makyen | CC BY-SA 4.0 |
Add disclosure for link to OP's GitHub
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| S Apr 5, 2019 at 0:23 | history | answered | leerssej | CC BY-SA 4.0 | |
| S Apr 5, 2019 at 0:23 | history | made wiki | Post Made Community Wiki by leerssej |