diff --git a/notes/.obsidian/plugins/obsidian-to-anki-plugin/data.json b/notes/.obsidian/plugins/obsidian-to-anki-plugin/data.json
index ea9963b..f15b806 100644
--- a/notes/.obsidian/plugins/obsidian-to-anki-plugin/data.json
+++ b/notes/.obsidian/plugins/obsidian-to-anki-plugin/data.json
@@ -21,88 +21,30 @@
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-    "data-structures/index.md": "2605977fad54956b5dc2d8dda9be2b10",
-    "data-structures/heaps.md": "a0289574930328d422b9b53047936274",
-    "data-structures/arrays.md": "5c320855d1955e897820053a7c3c065b",
-    "combinatorics/permutations.md": "efd0820ab3cc7faa5b2df3fe40105110",
-    "combinatorics/multiplicative-principle.md": "7c06835fa34cfefa217a10cf11ef4ab0",
-    "combinatorics/index.md": "66efa649c4c87e58fc82c2199096ade4",
-    "combinatorics/inclusion-exclusion.md": "c27b49ee03cc5ee854d0e8bd12a1d505",
-    "combinatorics/combinations.md": "396fc32255710eaf33213efaafdc43d4",
-    "combinatorics/additive-principle.md": "d036ac511e382d5c1caca437341a5915",
-    "c17/strings.md": "2da50edd26eae35c81f70e65bbd12d49",
-    "c17/index.md": "78576ee41d0185df82c59999142f4edb",
-    "c17/declarations.md": "ab6d44e48b0c1c8d98cd409721cc2c53",
-    "binary/index.md": "9089c6f0e86a0727cd03984f51350de0",
-    "binary/endianness.md": "63117fe7795e2a10cb2eb7843a089d9d",
-    "bash/shebang.md": "577e32f9f508625fd9b4002a7a26b211",
-    "bash/robustness.md": "a3d924e0c58bbf0a2f2b0482f5cf94b6",
-    "bash/prompts.md": "cc51c210fa819338d4e95658955173df",
-    "bash/index.md": "22083ea1ee9505cc96b02f82f63ba2c9",
-    "algorithms/sorting/selection-sort.md": "73415c44d6f4429f43c366078fd4bf98",
-    "algorithms/sorting/merge-sort.md": "6506483f7df6507cee0407bd205dbedd",
-    "algorithms/sorting/insertion-sort.md": "8bb3217cc3f49083d45a0095c667d176",
-    "algorithms/sorting/index.md": "4a66e28bce754de5df31ec2f4aed7e93",
-    "algorithms/sorting/heapsort.md": "d4f5a4d023b7a2e55035a8812acc71b6",
-    "algorithms/sorting/bubble-sort.md": "872fb23e41fb3ac36e8c46240e9a027f",
-    "algorithms/order-growth.md": "1c3f7ff710b6e67a04e16cdfd0f63e8c",
-    "algorithms/loop-invariant.md": "3b390e720f3b2a98e611b49a0bb1f5a9",
-    "algorithms/index.md": "3ac071354e55242919cc574eb43de6f8",
-    "algorithms/binary-search.md": "8533a05ea372e007ab4e8a36fd2772a9",
-    "algebra/set.md": "f7a775cd9f6bf0b3a127fc9c3b9a3c15",
-    "algebra/sequences/triangular-numbers.md": "1ae6730fa64bbb44d1d51a899f047584",
-    "algebra/sequences/square-numbers.md": "171f7c5a8dac088afba40923ab86c68e",
-    "algebra/sequences/index.md": "208174a5a078b120fa11e296ad1d09c1",
-    "algebra/sequences/geometric.md": "57544cab59f0b8c28d4a11f0273a3119",
-    "algebra/sequences/delta-constant.md": "d9af958375cdf993e4ac3c68c1324ba7",
-    "algebra/sequences/arithmetic.md": "63cb1bd3a0d01942f4f7a4212c742cfd",
-    "algebra/polynomials.md": "da56d2d6934acfa2c6b7b2c73c87b2c7",
-    "algebra/index.md": "90b842eb694938d87c7c68779a5cacd1",
-    "algebra/radices.md": "662a3e2f611dd9655f1ef6c7ed0a9943",
-    "algebra/floor-ceiling.md": "a22efe853ad1234b2d3e0d7cc7e6fc47",
-    "algebra/boolean.md": "ee41e624f4d3d3aca00020d9a9ae42c8",
-    "abstract-data-types/stacks.md": "d4324db19a88211dc6bf4f0e56c74cec",
-    "abstract-data-types/queues.md": "db668234b6c6051635321730b7176dcb",
-    "abstract-data-types/priority-queues.md": "d3dad736cb05c47bdc93c52a3a4af083",
-    "abstract-data-types/index.md": "ff6dbecefeec918a1def38af4999fc51"
+    "ontology/philosophy/dialetheism.md": "56dd05b38519f90c5cab93637978b3b3"
   },
   "fields_dict": {
     "Basic": [
diff --git a/notes/_journal/2024-07-28.md b/notes/_journal/2024-07-28.md
index 239f5ac..4fa0fe3 100644
--- a/notes/_journal/2024-07-28.md
+++ b/notes/_journal/2024-07-28.md
@@ -6,4 +6,7 @@ title: "2024-07-28"
 - [x] KoL
 - [x] OGS
 - [ ] Sheet Music (10 min.)
-- [ ] Korean (Read 1 Story)
\ No newline at end of file
+- [ ] Korean (Read 1 Story)
+
+* Initial notes on [[ontology/rdf/index|RDF]].
+* Notes and flashcards on [[uri|URIs]].
\ No newline at end of file
diff --git a/notes/ontology/rdf/uri.md b/notes/ontology/rdf/uri.md
index 46ea47f..c1e858e 100644
--- a/notes/ontology/rdf/uri.md
+++ b/notes/ontology/rdf/uri.md
@@ -51,6 +51,308 @@ Reference: Allemang, Dean, James A. Hendler, and Fabien L. Gandon. _Semantic Web
 <!--ID: 1722191359873-->
 END%%
 
+The URI generic syntax consists of five components organized hierarchically in order of decreasing significance from left to right:
+
+```
+<scheme>:[//<authority>]<path>[?<query>][#<fragment>]
+```
+
+where the `<authority>` is further composed as
+
+```
+[<userinfo>@]<host>[:<port>]
+```
+
+%%ANKI
+Cloze
+A URI has the following generic syntax:
+
+{`<schema>`}`:`{`[//<authority>]`}`]`{`<path>`}{`[?<query>]`}{`[#<fragment>]`}.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211276499-->
+END%%
+
+%%ANKI
+Basic
+Which two components of a URI are required?
+Back: The scheme and the path.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211744659-->
+END%%
+
+%%ANKI
+Basic
+Which three components of a URI are optional?
+Back: The authority, query, and fragment.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211744664-->
+END%%
+
+%%ANKI
+Basic
+How many top-level components make up a URI's generic syntax?
+Back: Five.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201375-->
+END%%
+
+%%ANKI
+Basic
+What is the associated delimiter of a URI's authority?
+Back: `//`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201382-->
+END%%
+
+%%ANKI
+Basic
+What is the associated delimiter of a URI's query?
+Back: `?`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201386-->
+END%%
+
+%%ANKI
+Basic
+What is the associated delimiter of a URI's scheme?
+Back: N/A.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201389-->
+END%%
+
+%%ANKI
+Basic
+What is the associated delimiter of a URI's fragment?
+Back: `#`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201393-->
+END%%
+
+%%ANKI
+Basic
+What is the associated delimiter of a URI's path?
+Back: N/A.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201397-->
+END%%
+
+%%ANKI
+Basic
+When is a URI's component considered "undefined"?
+Back: When its associated delimiter is not present in the URI.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201402-->
+END%%
+
+%%ANKI
+Basic
+Which URI components are always defined?
+Back: The scheme and the path.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201407-->
+END%%
+
+%%ANKI
+Basic
+What delimiter separates the segments of a path?
+Back: `/`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201412-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what scheme? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: `http`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201466-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what authority? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: `//www.example.com`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201450-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what userinfo? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: N/A. It is undefined
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212472982-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what port? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: N/A. It is undefined
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212472988-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what host? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: `www.example.com`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212472995-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what path? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: `/questions/3456/my-document`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201416-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what query? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201460-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what fragment? $$\text{http://www.example.com/questions/3456/my-document}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212201472-->
+END%%
+
+%%ANKI
+Cloze
+The authority of a URI has the following generic syntax:
+
+{`[<userinfo>@]`}{`<host>`}{`[:<port>]}
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211744669-->
+END%%
+
+%%ANKI
+Basic
+Which two components of a URI's authority is optional?
+Back: The user info and port.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211744675-->
+END%%
+
+%%ANKI
+Basic
+Which component of a URI's authority is required?
+Back: The host.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722211744680-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what fragment? $$\text{ldap://[2001:db8::7]/c=GB?objectClass?one}$$
+Back: `ldap`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212473001-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what fragment? $$\text{ldap://[2001:db8::7]/c=GB?objectClass?one}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790216-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what authority? $$\text{ldap://[2001:db8::7]/c=GB?objectClass?one}$$
+Back: `[2001:db8::7]`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790223-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what query? $$\text{ldap://[2001:db8::7]/c=GB?objectClass?one}$$
+Back: `objectClass?one`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790228-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what path? $$\text{ldap://[2001:db8::7]/c=GB?objectClass?one}$$
+Back: `/c=GB`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790232-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what scheme? $$\text{tel:+1-816-555-1212}$$
+Back: `tel`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790236-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what authority? $$\text{tel:+1-816-555-1212}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790241-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what path? $$\text{tel:+1-816-555-1212}$$
+Back: `+1-816-555-1212`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790247-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what query? $$\text{tel:+1-816-555-1212}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790252-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what fragment? $$\text{tel:+1-816-555-1212}$$
+Back: N/A. It is undefined.
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790258-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what scheme? $$\text{telnet://192.0.2.16:80/}$$
+Back: `telnet`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790265-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what authority? $$\text{telnet://192.0.2.16:80/}$$
+Back: `192.0.2.16:80`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790272-->
+END%%
+
+%%ANKI
+Basic
+The following URI has what path? $$\text{telnet://192.0.2.16:80/}$$
+Back: `/`
+Reference: “Uniform Resource Identifier.” In _Wikipedia_, July 22, 2024. [https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier](https://en.wikipedia.org/w/index.php?title=Uniform_Resource_Identifier&oldid=1235957234).
+<!--ID: 1722212790279-->
+END%%
+
 ### URLs
 
 A **uniform resource locator** (URL) is a URI that specifies the means of finding the represented resource. The most commonly used schemes are `http` and `https`.