Repository: FHIR/sushi (ts)

Issue:
Recursion Bug for Extensions w/ Context Set to Self
Complex extensions may be recursive (e.g., contain a nested extension referring to themself). In this case, the extension should add itself to its `Context:`. If an author attempts to do this, however, SUSHI fails due to infinite recursion.

Example (on [FSH Online](https://fshschool.org/FSHOnline/#/share/401ycyI)):
```
Extension: Node
Context: Device, Node
Title: "Node"
Description: "A node in a file system"
* extension contains name 1..1 and isFolder 1..1 and Node named children 0..*
* extension[name].value[x] only string
* extension[isFolder].value[x] only boolean
```

Pull request description:
Handle recursive extension contexts
This PR updates the SD exporter to process extension contexts last so that all the necessary components of the SD are in place and available in the Package. This allows proper lookup of sub-extensions and avoids infinitely recursive fishing.

I ran a full regression and one project came back with a change. It turns out they were only setting `^context.expression` and not `^context.type`. This worked because SUSHI was adding a default context and `^context.expression` was just overwriting the expression part and leaving the type part in place. With this PR change in place, the `^context.type` remains blank in the JSON (since they didn't set it). I think this is the proper behavior because a default context should not have been applied in the first place since they were setting their own context. I've filed a PR to fix this on that one project [here](https://github.com/HL7/davinci-dtr/pull/102).

Fixes #1375 

Patch:
diff --git a/npm-shrinkwrap.json b/npm-shrinkwrap.json
index 927c8fd..c8e8af6 100644
--- a/npm-shrinkwrap.json
+++ b/npm-shrinkwrap.json
@@ -92,17 +92,89 @@
       }
     },
     "node_modules/@babel/code-frame": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.5.tgz",
-      "integrity": "sha512-Xmwn266vad+6DAqEB2A6V/CcZVp62BbwVmcOJc2RPuwih1kw02TjQvWVWlcKGbBPd+8/0V5DEkOcizRGYsspYQ==",
+      "version": "7.22.13",
+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.13.tgz",
+      "integrity": "sha512-XktuhWlJ5g+3TJXc5upd9Ks1HutSArik6jf2eAjYFyIOf4ej3RN+184cZbzDvbPnuTJIUhPKKJE3cIsYTiAT3w==",
       "dev": true,
       "dependencies": {
-        "@babel/highlight": "^7.22.5"
+        "@babel/highlight": "^7.22.13",
+        "chalk": "^2.4.2"
       },
       "engines": {
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@babel/code-frame/node_modules/ansi-styles": {
+      "version": "3.2.1",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+      "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+      "dev": true,
+      "dependencies": {
+        "color-convert": "^1.9.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@babel/code-frame/node_modules/chalk": {
+      "version": "2.4.2",
+      "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+      "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+      "dev": true,
+      "dependencies": {
+        "ansi-styles": "^3.2.1",
+        "escape-string-regexp": "^1.0.5",
+        "supports-color": "^5.3.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@babel/code-frame/node_modules/color-convert": {
+      "version": "1.9.3",
+      "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+      "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+      "dev": true,
+      "dependencies": {
+        "color-name": "1.1.3"
+      }
+    },
+    "node_modules/@babel/code-frame/node_modules/color-name": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+      "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
+      "dev": true
+    },
+    "node_modules/@babel/code-frame/node_modules/escape-string-regexp": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+      "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.8.0"
+      }
+    },
+    "node_modules/@babel/code-frame/node_modules/has-flag": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+      "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+      "dev": true,
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/@babel/code-frame/node_modules/supports-color": {
+      "version": "5.5.0",
+      "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+      "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+      "dev": true,
+      "dependencies": {
+        "has-flag": "^3.0.0"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/@babel/compat-data": {
       "version": "7.22.6",
       "resolved": "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.22.6.tgz",
@@ -143,12 +215,12 @@
       }
     },
     "node_modules/@babel/generator": {
-      "version": "7.22.7",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.22.7.tgz",
-      "integrity": "sha512-p+jPjMG+SI8yvIaxGgeW24u7q9+5+TGpZh8/CuB7RhBKd7RCy8FayNEFNNKrNK/eUcY/4ExQqLmyrvBXKsIcwQ==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.23.0.tgz",
+      "integrity": "sha512-lN85QRR+5IbYrMWM6Y4pE/noaQtg4pNiqeNGX60eqOfo6gtEj6uw/JagelB8vVztSd7R6M5n1+PQkDbHbBRU4g==",
       "dev": true,
       "dependencies": {
-        "@babel/types": "^7.22.5",
+        "@babel/types": "^7.23.0",
         "@jridgewell/gen-mapping": "^0.3.2",
         "@jridgewell/trace-mapping": "^0.3.17",
         "jsesc": "^2.5.1"
@@ -206,22 +278,22 @@
       "dev": true
     },
     "node_modules/@babel/helper-environment-visitor": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.22.5.tgz",
-      "integrity": "sha512-XGmhECfVA/5sAt+H+xpSg0mfrHq6FzNr9Oxh7PSEBBRUb/mL7Kz3NICXb194rCqAEdxkhPT1a88teizAFyvk8Q==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.22.20.tgz",
+      "integrity": "sha512-zfedSIzFhat/gFhWfHtgWvlec0nqB9YEIVrpuwjruLlXfUSnA8cJB0miHKwqDnQ7d32aKo2xt88/xZptwxbfhA==",
       "dev": true,
       "engines": {
         "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/helper-function-name": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.22.5.tgz",
-      "integrity": "sha512-wtHSq6jMRE3uF2otvfuD3DIvVhOsSNshQl0Qrd7qC9oQJzHvOL4qQXlQn2916+CXGywIjpGuIkoyZRRxHPiNQQ==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.23.0.tgz",
+      "integrity": "sha512-OErEqsrxjZTJciZ4Oo+eoZqeW9UIiOcuYKRJA4ZAgV9myA+pOXhhmpfNCKjEH/auVfEYVFJ6y1Tc4r0eIApqiw==",
       "dev": true,
       "dependencies": {
-        "@babel/template": "^7.22.5",
-        "@babel/types": "^7.22.5"
+        "@babel/template": "^7.22.15",
+        "@babel/types": "^7.23.0"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -313,9 +385,9 @@
       }
     },
     "node_modules/@babel/helper-validator-identifier": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.5.tgz",
-      "integrity": "sha512-aJXu+6lErq8ltp+JhkJUfk1MTGyuA4v7f3pA+BJ5HLfNC6nAQ0Cpi9uOquUj8Hehg0aUiHzWQbOVJGao6ztBAQ==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.20.tgz",
+      "integrity": "sha512-Y4OZ+ytlatR8AI+8KZfKuL5urKp7qey08ha31L8b3BwewJAoJamTzyvxPR/5D+KkdJCGPq/+8TukHBlY10FX9A==",
       "dev": true,
       "engines": {
         "node": ">=6.9.0"
@@ -345,13 +417,13 @@
       }
     },
     "node_modules/@babel/highlight": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.5.tgz",
-      "integrity": "sha512-BSKlD1hgnedS5XRnGOljZawtag7H1yPfQp0tdNJCHoH6AZ+Pcm9VvkrK59/Yy593Ypg0zMxH2BxD1VPYUQ7UIw==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.20.tgz",
+      "integrity": "sha512-dkdMCN3py0+ksCgYmGG8jKeGA/8Tk+gJwSYYlFGxG5lmhfKNoAy004YpLxpS1W2J8m/EK2Ew+yOs9pVRwO89mg==",
       "dev": true,
       "dependencies": {
-        "@babel/helper-validator-identifier": "^7.22.5",
-        "chalk": "^2.0.0",
+        "@babel/helper-validator-identifier": "^7.22.20",
+        "chalk": "^2.4.2",
         "js-tokens": "^4.0.0"
       },
       "engines": {
@@ -430,9 +502,9 @@
       }
     },
     "node_modules/@babel/parser": {
-      "version": "7.22.7",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.22.7.tgz",
-      "integrity": "sha512-7NF8pOkHP5o2vpmGgNGcfAeCvOYhGLyA3Z4eBQkT1RJlWu47n63bCs93QfJ2hIAFCil7L5P2IWhs1oToVgrL0Q==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.23.0.tgz",
+      "integrity": "sha512-vvPKKdMemU85V9WE/l5wZEmImpCtLqbnTvqDS2U1fJ96KrxoW7KrXhNsNCblQlg8Ck4b85yxdTyelsMUgFUXiw==",
       "dev": true,
       "bin": {
         "parser": "bin/babel-parser.js"
@@ -604,33 +676,33 @@
       }
     },
     "node_modules/@babel/template": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.22.5.tgz",
-      "integrity": "sha512-X7yV7eiwAxdj9k94NEylvbVHLiVG1nvzCV2EAowhxLTwODV1jl9UzZ48leOC0sH7OnuHrIkllaBgneUykIcZaw==",
+      "version": "7.22.15",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.22.15.tgz",
+      "integrity": "sha512-QPErUVm4uyJa60rkI73qneDacvdvzxshT3kksGqlGWYdOTIUOwJ7RDUL8sGqslY1uXWSL6xMFKEXDS3ox2uF0w==",
       "dev": true,
       "dependencies": {
-        "@babel/code-frame": "^7.22.5",
-        "@babel/parser": "^7.22.5",
-        "@babel/types": "^7.22.5"
+        "@babel/code-frame": "^7.22.13",
+        "@babel/parser": "^7.22.15",
+        "@babel/types": "^7.22.15"
       },
       "engines": {
         "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/traverse": {
-      "version": "7.22.8",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.22.8.tgz",
-      "integrity": "sha512-y6LPR+wpM2I3qJrsheCTwhIinzkETbplIgPBbwvqPKc+uljeA5gP+3nP8irdYt1mjQaDnlIcG+dw8OjAco4GXw==",
+      "version": "7.23.2",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.23.2.tgz",
+      "integrity": "sha512-azpe59SQ48qG6nu2CzcMLbxUudtN+dOM9kDbUqGq3HXUJRlo7i8fvPoxQUzYgLZ4cMVmuZgm8vvBpNeRhd6XSw==",
       "dev": true,
       "dependencies": {
-        "@babel/code-frame": "^7.22.5",
-        "@babel/generator": "^7.22.7",
-        "@babel/helper-environment-visitor": "^7.22.5",
-        "@babel/helper-function-name": "^7.22.5",
+        "@babel/code-frame": "^7.22.13",
+        "@babel/generator": "^7.23.0",
+        "@babel/helper-environment-visitor": "^7.22.20",
+        "@babel/helper-function-name": "^7.23.0",
         "@babel/helper-hoist-variables": "^7.22.5",
         "@babel/helper-split-export-declaration": "^7.22.6",
-        "@babel/parser": "^7.22.7",
-        "@babel/types": "^7.22.5",
+        "@babel/parser": "^7.23.0",
+        "@babel/types": "^7.23.0",
         "debug": "^4.1.0",
         "globals": "^11.1.0"
       },
@@ -648,13 +720,13 @@
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     "node_modules/@babel/types": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.22.5.tgz",
-      "integrity": "sha512-zo3MIHGOkPOfoRXitsgHLjEXmlDaD/5KU1Uzuc9GNiZPhSqVxVRtxuPaSBZDsYZ9qV88AjtMtWW7ww98loJ9KA==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.23.0.tgz",
+      "integrity": "sha512-0oIyUfKoI3mSqMvsxBdclDwxXKXAUA8v/apZbc+iSyARYou1o8ZGDxbUYyLFoW2arqS2jDGqJuZvv1d/io1axg==",
       "dev": true,
       "dependencies": {
         "@babel/helper-string-parser": "^7.22.5",
-        "@babel/helper-validator-identifier": "^7.22.5",
+        "@babel/helper-validator-identifier": "^7.22.20",
         "to-fast-properties": "^2.0.0"
       },
       "engines": {
@@ -7880,12 +7952,71 @@
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-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.5.tgz",
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+      "resolved": "https://registry.npmjs.org/@babel/code-frame/-/code-frame-7.22.13.tgz",
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       "dev": true,
       "requires": {
-        "@babel/highlight": "^7.22.5"
+        "@babel/highlight": "^7.22.13",
+        "chalk": "^2.4.2"
+      },
+      "dependencies": {
+        "ansi-styles": {
+          "version": "3.2.1",
+          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
+          "integrity": "sha512-VT0ZI6kZRdTh8YyJw3SMbYm/u+NqfsAxEpWO0Pf9sq8/e94WxxOpPKx9FR1FlyCtOVDNOQ+8ntlqFxiRc+r5qA==",
+          "dev": true,
+          "requires": {
+            "color-convert": "^1.9.0"
+          }
+        },
+        "chalk": {
+          "version": "2.4.2",
+          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
+          "integrity": "sha512-Mti+f9lpJNcwF4tWV8/OrTTtF1gZi+f8FqlyAdouralcFWFQWF2+NgCHShjkCb+IFBLq9buZwE1xckQU4peSuQ==",
+          "dev": true,
+          "requires": {
+            "ansi-styles": "^3.2.1",
+            "escape-string-regexp": "^1.0.5",
+            "supports-color": "^5.3.0"
+          }
+        },
+        "color-convert": {
+          "version": "1.9.3",
+          "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
+          "integrity": "sha512-QfAUtd+vFdAtFQcC8CCyYt1fYWxSqAiK2cSD6zDB8N3cpsEBAvRxp9zOGg6G/SHHJYAT88/az/IuDGALsNVbGg==",
+          "dev": true,
+          "requires": {
+            "color-name": "1.1.3"
+          }
+        },
+        "color-name": {
+          "version": "1.1.3",
+          "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
+          "integrity": "sha512-72fSenhMw2HZMTVHeCA9KCmpEIbzWiQsjN+BHcBbS9vr1mtt+vJjPdksIBNUmKAW8TFUDPJK5SUU3QhE9NEXDw==",
+          "dev": true
+        },
+        "escape-string-regexp": {
+          "version": "1.0.5",
+          "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-1.0.5.tgz",
+          "integrity": "sha512-vbRorB5FUQWvla16U8R/qgaFIya2qGzwDrNmCZuYKrbdSUMG6I1ZCGQRefkRVhuOkIGVne7BQ35DSfo1qvJqFg==",
+          "dev": true
+        },
+        "has-flag": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-3.0.0.tgz",
+          "integrity": "sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==",
+          "dev": true
+        },
+        "supports-color": {
+          "version": "5.5.0",
+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.5.0.tgz",
+          "integrity": "sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==",
+          "dev": true,
+          "requires": {
+            "has-flag": "^3.0.0"
+          }
+        }
       }
     },
     "@babel/compat-data": {
@@ -7918,12 +8049,12 @@
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     "@babel/generator": {
-      "version": "7.22.7",
-      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.22.7.tgz",
-      "integrity": "sha512-p+jPjMG+SI8yvIaxGgeW24u7q9+5+TGpZh8/CuB7RhBKd7RCy8FayNEFNNKrNK/eUcY/4ExQqLmyrvBXKsIcwQ==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/generator/-/generator-7.23.0.tgz",
+      "integrity": "sha512-lN85QRR+5IbYrMWM6Y4pE/noaQtg4pNiqeNGX60eqOfo6gtEj6uw/JagelB8vVztSd7R6M5n1+PQkDbHbBRU4g==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.22.5",
+        "@babel/types": "^7.23.0",
         "@jridgewell/gen-mapping": "^0.3.2",
         "@jridgewell/trace-mapping": "^0.3.17",
         "jsesc": "^2.5.1"
@@ -7973,19 +8104,19 @@
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     },
     "@babel/helper-environment-visitor": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.22.5.tgz",
-      "integrity": "sha512-XGmhECfVA/5sAt+H+xpSg0mfrHq6FzNr9Oxh7PSEBBRUb/mL7Kz3NICXb194rCqAEdxkhPT1a88teizAFyvk8Q==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.22.20.tgz",
+      "integrity": "sha512-zfedSIzFhat/gFhWfHtgWvlec0nqB9YEIVrpuwjruLlXfUSnA8cJB0miHKwqDnQ7d32aKo2xt88/xZptwxbfhA==",
       "dev": true
     },
     "@babel/helper-function-name": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.22.5.tgz",
-      "integrity": "sha512-wtHSq6jMRE3uF2otvfuD3DIvVhOsSNshQl0Qrd7qC9oQJzHvOL4qQXlQn2916+CXGywIjpGuIkoyZRRxHPiNQQ==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.23.0.tgz",
+      "integrity": "sha512-OErEqsrxjZTJciZ4Oo+eoZqeW9UIiOcuYKRJA4ZAgV9myA+pOXhhmpfNCKjEH/auVfEYVFJ6y1Tc4r0eIApqiw==",
       "dev": true,
       "requires": {
-        "@babel/template": "^7.22.5",
-        "@babel/types": "^7.22.5"
+        "@babel/template": "^7.22.15",
+        "@babel/types": "^7.23.0"
       }
     },
     "@babel/helper-hoist-variables": {
@@ -8053,9 +8184,9 @@
       "dev": true
     },
     "@babel/helper-validator-identifier": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.5.tgz",
-      "integrity": "sha512-aJXu+6lErq8ltp+JhkJUfk1MTGyuA4v7f3pA+BJ5HLfNC6nAQ0Cpi9uOquUj8Hehg0aUiHzWQbOVJGao6ztBAQ==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.22.20.tgz",
+      "integrity": "sha512-Y4OZ+ytlatR8AI+8KZfKuL5urKp7qey08ha31L8b3BwewJAoJamTzyvxPR/5D+KkdJCGPq/+8TukHBlY10FX9A==",
       "dev": true
     },
     "@babel/helper-validator-option": {
@@ -8076,13 +8207,13 @@
       }
     },
     "@babel/highlight": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.5.tgz",
-      "integrity": "sha512-BSKlD1hgnedS5XRnGOljZawtag7H1yPfQp0tdNJCHoH6AZ+Pcm9VvkrK59/Yy593Ypg0zMxH2BxD1VPYUQ7UIw==",
+      "version": "7.22.20",
+      "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.22.20.tgz",
+      "integrity": "sha512-dkdMCN3py0+ksCgYmGG8jKeGA/8Tk+gJwSYYlFGxG5lmhfKNoAy004YpLxpS1W2J8m/EK2Ew+yOs9pVRwO89mg==",
       "dev": true,
       "requires": {
-        "@babel/helper-validator-identifier": "^7.22.5",
-        "chalk": "^2.0.0",
+        "@babel/helper-validator-identifier": "^7.22.20",
+        "chalk": "^2.4.2",
         "js-tokens": "^4.0.0"
       },
       "dependencies": {
@@ -8145,9 +8276,9 @@
       }
     },
     "@babel/parser": {
-      "version": "7.22.7",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.22.7.tgz",
-      "integrity": "sha512-7NF8pOkHP5o2vpmGgNGcfAeCvOYhGLyA3Z4eBQkT1RJlWu47n63bCs93QfJ2hIAFCil7L5P2IWhs1oToVgrL0Q==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.23.0.tgz",
+      "integrity": "sha512-vvPKKdMemU85V9WE/l5wZEmImpCtLqbnTvqDS2U1fJ96KrxoW7KrXhNsNCblQlg8Ck4b85yxdTyelsMUgFUXiw==",
       "dev": true
     },
     "@babel/plugin-syntax-async-generators": {
@@ -8268,30 +8399,30 @@
       }
     },
     "@babel/template": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.22.5.tgz",
-      "integrity": "sha512-X7yV7eiwAxdj9k94NEylvbVHLiVG1nvzCV2EAowhxLTwODV1jl9UzZ48leOC0sH7OnuHrIkllaBgneUykIcZaw==",
+      "version": "7.22.15",
+      "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.22.15.tgz",
+      "integrity": "sha512-QPErUVm4uyJa60rkI73qneDacvdvzxshT3kksGqlGWYdOTIUOwJ7RDUL8sGqslY1uXWSL6xMFKEXDS3ox2uF0w==",
       "dev": true,
       "requires": {
-        "@babel/code-frame": "^7.22.5",
-        "@babel/parser": "^7.22.5",
-        "@babel/types": "^7.22.5"
+        "@babel/code-frame": "^7.22.13",
+        "@babel/parser": "^7.22.15",
+        "@babel/types": "^7.22.15"
       }
     },
     "@babel/traverse": {
-      "version": "7.22.8",
-      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.22.8.tgz",
-      "integrity": "sha512-y6LPR+wpM2I3qJrsheCTwhIinzkETbplIgPBbwvqPKc+uljeA5gP+3nP8irdYt1mjQaDnlIcG+dw8OjAco4GXw==",
+      "version": "7.23.2",
+      "resolved": "https://registry.npmjs.org/@babel/traverse/-/traverse-7.23.2.tgz",
+      "integrity": "sha512-azpe59SQ48qG6nu2CzcMLbxUudtN+dOM9kDbUqGq3HXUJRlo7i8fvPoxQUzYgLZ4cMVmuZgm8vvBpNeRhd6XSw==",
       "dev": true,
       "requires": {
-        "@babel/code-frame": "^7.22.5",
-        "@babel/generator": "^7.22.7",
-        "@babel/helper-environment-visitor": "^7.22.5",
-        "@babel/helper-function-name": "^7.22.5",
+        "@babel/code-frame": "^7.22.13",
+        "@babel/generator": "^7.23.0",
+        "@babel/helper-environment-visitor": "^7.22.20",
+        "@babel/helper-function-name": "^7.23.0",
         "@babel/helper-hoist-variables": "^7.22.5",
         "@babel/helper-split-export-declaration": "^7.22.6",
-        "@babel/parser": "^7.22.7",
-        "@babel/types": "^7.22.5",
+        "@babel/parser": "^7.23.0",
+        "@babel/types": "^7.23.0",
         "debug": "^4.1.0",
         "globals": "^11.1.0"
       },
@@ -8305,13 +8436,13 @@
       }
     },
     "@babel/types": {
-      "version": "7.22.5",
-      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.22.5.tgz",
-      "integrity": "sha512-zo3MIHGOkPOfoRXitsgHLjEXmlDaD/5KU1Uzuc9GNiZPhSqVxVRtxuPaSBZDsYZ9qV88AjtMtWW7ww98loJ9KA==",
+      "version": "7.23.0",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.23.0.tgz",
+      "integrity": "sha512-0oIyUfKoI3mSqMvsxBdclDwxXKXAUA8v/apZbc+iSyARYou1o8ZGDxbUYyLFoW2arqS2jDGqJuZvv1d/io1axg==",
       "dev": true,
       "requires": {
         "@babel/helper-string-parser": "^7.22.5",
-        "@babel/helper-validator-identifier": "^7.22.5",
+        "@babel/helper-validator-identifier": "^7.22.20",
         "to-fast-properties": "^2.0.0"
       }
     },
diff --git a/src/export/StructureDefinitionExporter.ts b/src/export/StructureDefinitionExporter.ts
index 746245e..4d14af6 100644
--- a/src/export/StructureDefinitionExporter.ts
+++ b/src/export/StructureDefinitionExporter.ts
@@ -429,8 +429,7 @@ export class StructureDefinitionExporter implements Fishable {
       if (url.fixedUri == null) {
         url.fixedUri = structDef.url;
       }
-      // context and contextInvariant only apply to extensions.
-      this.setContext(structDef, fshDefinition);
+      // NOTE: Context is set later to avoid infinitely recursive fishing and to ensure sub-extension elements are already defined.
     } else {
       // Should not be defined for non-extensions, but clear just to be sure
       delete structDef.context;
@@ -1321,6 +1320,12 @@ export class StructureDefinitionExporter implements Fishable {
 
     this.setRules(structDef, fshDefinition);
 
+    if (fshDefinition instanceof Extension) {
+      // Set the context last so that contexts referring to self work properly and have all
+      // necessary sub-extensions already. This also allows us to avoid recursive fishing.
+      this.setContext(structDef, fshDefinition);
+    }
+
     // The recursive structDef fields on elements should be ignored to avoid infinite looping
     // And, the _sliceName and _primitive properties added by SUSHI should be skipped.
     cleanResource(structDef, (prop: string) =>


Test patch:
diff --git a/test/export/StructureDefinition.ExtensionExporter.test.ts b/test/export/StructureDefinition.ExtensionExporter.test.ts
index 633457d..9cd4c82 100644
--- a/test/export/StructureDefinition.ExtensionExporter.test.ts
+++ b/test/export/StructureDefinition.ExtensionExporter.test.ts
@@ -349,6 +349,63 @@ describe('ExtensionExporter', () => {
       ]);
     });
 
+    it('should set extension context to itself by url', () => {
+      const extension = new Extension('MyExtension');
+      extension.id = 'my-extension';
+      extension.contexts = [
+        {
+          value: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension',
+          isQuoted: false
+        }
+      ];
+      doc.extensions.set(extension.name, extension);
+      const exported = exporter.exportStructDef(extension);
+      expect(exported.context).toEqual([
+        {
+          type: 'extension',
+          expression: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension'
+        }
+      ]);
+    });
+
+    it('should set extension context to itself by name', () => {
+      const extension = new Extension('MyExtension');
+      extension.id = 'my-extension';
+      extension.contexts = [
+        {
+          value: 'MyExtension',
+          isQuoted: false
+        }
+      ];
+      doc.extensions.set(extension.name, extension);
+      const exported = exporter.exportStructDef(extension);
+      expect(exported.context).toEqual([
+        {
+          type: 'extension',
+          expression: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension'
+        }
+      ]);
+    });
+
+    it('should set extension context to itself by id', () => {
+      const extension = new Extension('MyExtension');
+      extension.id = 'my-extension';
+      extension.contexts = [
+        {
+          value: 'my-extension',
+          isQuoted: false
+        }
+      ];
+      doc.extensions.set(extension.name, extension);
+      const exported = exporter.exportStructDef(extension);
+      expect(exported.context).toEqual([
+        {
+          type: 'extension',
+          expression: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension'
+        }
+      ]);
+    });
+
     it('should set extension context for a base resource by url with a FSH path', () => {
       const extension = new Extension('MyExtension');
       extension.contexts = [
@@ -475,6 +532,50 @@ describe('ExtensionExporter', () => {
       ]);
     });
 
+    it('should set extension context with type "extension" when the path is its own sub-extension by name', () => {
+      const extension = new Extension('MyExtension');
+      extension.id = 'my-extension';
+      extension.contexts = [
+        {
+          value: 'MyExtension.extension[foo]',
+          isQuoted: false
+        }
+      ];
+      const containsRule = new ContainsRule('extension');
+      containsRule.items = [{ name: 'foo' }];
+      extension.rules.push(containsRule);
+      doc.extensions.set(extension.name, extension);
+      const exported = exporter.exportStructDef(extension);
+      expect(exported.context).toEqual([
+        {
+          type: 'extension',
+          expression: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension#foo'
+        }
+      ]);
+    });
+
+    it('should set extension context with type "extension" when the path is is its own sub-extension by url', () => {
+      const extension = new Extension('MyExtension');
+      extension.id = 'my-extension';
+      extension.contexts = [
+        {
+          value: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension#extension[foo]',
+          isQuoted: false
+        }
+      ];
+      const containsRule = new ContainsRule('extension');
+      containsRule.items = [{ name: 'foo' }];
+      extension.rules.push(containsRule);
+      doc.extensions.set(extension.name, extension);
+      const exported = exporter.exportStructDef(extension);
+      expect(exported.context).toEqual([
+        {
+          type: 'extension',
+          expression: 'http://hl7.org/fhir/us/minimal/StructureDefinition/my-extension#foo'
+        }
+      ]);
+    });
+
     it('should set extension context with type "extension" when the path is a deep part of a complex extension by name', () => {
       const extension = new Extension('MyExtension');
       extension.contexts = [