diff --git a/Data-model.md b/Data-model.md
index 6986e12..c631a26 100644
--- a/Data-model.md
+++ b/Data-model.md
@@ -105,7 +105,7 @@ Cultures (races, language zones) data is stored as an array of objects with stri
 * `i`: `number` - culture id, always equal to the array index
 * `base`: `number` - _nameBase_ id, name base is used for names generation
 * `name`: `string` - culture name
-* `origin`: `number` - origin culture id. Used to render cultures tree to show cultures evolution
+* `origins`: `number[]` - ids of origin cultures. Used to render cultures tree to show cultures evolution. The first array member is main link, other - supporting out-of-tree links
 * `shield`: `string` - shield type. Used for emblems rendering
 * `center`: `number` - cell id of culture center (initial cell)
 * `code`: `string` - culture name abbreviation. Used to render cultures tree
@@ -197,7 +197,7 @@ Religions data is stored as an array of objects with strict element order. Eleme
 * `deity`: `string` - religion supreme deity if any
 * `color`: `string` - religion color in hex (e.g. `#45ff12`) or link to hatching pattern (e.g. `url(#hatch7)`)
 * `code`: `string` - religion name abbreviation. Used to render religions tree
-* `origin`: `number` - if of ancestor religion. `0` if religion is folk and doesn't have an ancestor
+* `origins`: `number[]` - ids of ancestor religions. `[0]` if religion doesn't have an ancestor. Used to render religions tree. The first array member is main link, other - supporting out-of-tree links
 * `center`: `number` - cell id of religion center (initial cell)
 * `culture`: `number` - if of religion original culture
 * `pole`: `number[]` - state pole of inaccessibility (visual center) coordinates, see [the concept description](https://blog.mapbox.com/a-new-algorithm-for-finding-a-visual-center-of-a-polygon-7c77e6492fbc?gi=6bd4fcb9ecc1)