Add support for more x-jsonld-* keywords (#906)

- `x-jsonld-datatype`
- `x-jsonld-language`
- `x-jsonld-direction`
- `x-jsonld-json`
- `x-jsonld-graph`
- `x-jsonld-reverse`

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

Author: jviotti

benchmark/micro/jsonld.cc

@@ -161,7 +161,8 @@ static auto Micro_JSONLD_Catalog(benchmark::State &state) -> void {
 
   sourcemeta::blaze::Tweaks tweaks;
   tweaks.annotations = std::unordered_set<sourcemeta::core::JSON::StringView>{
-      "x-jsonld-id", "x-jsonld-type"};
+      sourcemeta::blaze::JSONLD_KEYWORDS.begin(),
+      sourcemeta::blaze::JSONLD_KEYWORDS.end()};
   const auto schema_template{sourcemeta::blaze::compile(
       schema, sourcemeta::blaze::schema_walker,
       sourcemeta::blaze::schema_resolver,

contrib/jsonld.cc

@@ -39,7 +39,8 @@ static auto run(const char *schema_path, const char *instance_path) -> int {
 
   sourcemeta::blaze::Tweaks tweaks;
   tweaks.annotations = std::unordered_set<sourcemeta::core::JSON::StringView>{
-      "x-jsonld-id", "x-jsonld-type"};
+      sourcemeta::blaze::JSONLD_KEYWORDS.begin(),
+      sourcemeta::blaze::JSONLD_KEYWORDS.end()};
   const auto schema_template{sourcemeta::blaze::compile(
       schema, sourcemeta::blaze::schema_walker,
       sourcemeta::blaze::schema_resolver,

src/output/CMakeLists.txt

@@ -17,6 +17,10 @@ target_link_libraries(sourcemeta_blaze_output PUBLIC
   sourcemeta::core::jsonpointer)
 target_link_libraries(sourcemeta_blaze_output PRIVATE
   sourcemeta::core::jsonld)
+target_link_libraries(sourcemeta_blaze_output PRIVATE
+  sourcemeta::core::langtag)
+target_link_libraries(sourcemeta_blaze_output PRIVATE
+  sourcemeta::core::text)
 target_link_libraries(sourcemeta_blaze_output PUBLIC
   sourcemeta::blaze::foundation)
 target_link_libraries(sourcemeta_blaze_output PUBLIC

src/output/include/sourcemeta/blaze/output_jsonld.h

@@ -11,16 +11,33 @@
 #include <sourcemeta/blaze/evaluator.h>
 #include <sourcemeta/blaze/output_simple.h>
 
+#include <array>   // std::array
 #include <cstdint> // std::uint8_t
 #include <string>  // std::string
 #include <variant> // std::variant
 #include <vector>  // std::vector
 
 namespace sourcemeta::blaze {
 
+/// @ingroup output
+/// The x-jsonld-* keywords that jsonld() resolves. Use these as the annotation
+/// whitelist when compiling a schema so that its annotations are collected.
+inline constexpr std::array<sourcemeta::core::JSON::StringView, 8>
+    JSONLD_KEYWORDS{{"x-jsonld-id", "x-jsonld-type", "x-jsonld-reverse",
+                     "x-jsonld-datatype", "x-jsonld-language",
+                     "x-jsonld-direction", "x-jsonld-json", "x-jsonld-graph"}};
+
 /// @ingroup output
 /// The descriptor facet that a JSON-LD resolution error is about
-enum class JSONLDFacet : std::uint8_t { Type, Predicate };
+enum class JSONLDFacet : std::uint8_t {
+  Type,
+  Predicate,
+  Datatype,
+  Language,
+  Direction,
+  Graph,
+  JSON
+};
 
 /// @ingroup output
 /// The instance conforms but one of its JSON-LD annotations cannot be resolved
@@ -72,8 +89,9 @@ using JSONLDOutcome =
 /// })JSON");
 ///
 /// sourcemeta::blaze::Tweaks tweaks;
-/// tweaks.annotations = std::unordered_set<sourcemeta::core::JSON::StringView>{
-///     "x-jsonld-id", "x-jsonld-type"};
+/// tweaks.annotations = std::unordered_set<sourcemeta::core::JSON::StringView>(
+///     sourcemeta::blaze::JSONLD_KEYWORDS.begin(),
+///     sourcemeta::blaze::JSONLD_KEYWORDS.end());
 ///
 /// const auto schema_template{sourcemeta::blaze::compile(
 ///     schema, sourcemeta::blaze::schema_walker,