--- /dev/null
+/*
+ * Copyright (c) 2024 PANTHEON.tech, s.r.o. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.yangtools.yang.parser.spi.source;
+
+import static java.util.Objects.requireNonNull;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import org.eclipse.jdt.annotation.NonNullByDefault;
+import org.eclipse.jdt.annotation.Nullable;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.common.QNameModule;
+import org.opendaylight.yangtools.yang.model.api.source.SourceIdentifier;
+import org.opendaylight.yangtools.yang.model.api.stmt.FeatureSet;
+import org.opendaylight.yangtools.yang.model.api.stmt.ModuleEffectiveStatement.ConformanceType;
+import org.opendaylight.yangtools.yang.model.spi.source.SourceInfo;
+
+/**
+ * Specification of a single parsing attempt.
+ *
+ * @param symbolicName symbolic name of this specification
+ * @param modules the set of modules to build
+ * @param featureSet the {@link FeatureSet} to apply
+ */
+@NonNullByDefault
+public record BuildSpecification(
+ String symbolicName,
+ ImmutableMap<QNameModule, SourceSpec.Module> modules,
+ @Nullable FeatureSet featureSet) {
+ public BuildSpecification {
+ requireNonNull(symbolicName);
+ requireNonNull(modules);
+ }
+
+ /**
+ * Specification of how a source should be processed.
+ */
+ public sealed interface SourceSpec permits SourceSpec.Module, SourceSpec.Submodule {
+ /**
+ * Return the {@link SourceInfo} about {@link #stream()}.
+ *
+ * @return the {@link SourceInfo}
+ */
+ // FIXME: should reside in stream()
+ SourceInfo info();
+
+ /**
+ * Return the {@link StatementStreamSource} of this source.
+ *
+ * @return the {@link StatementStreamSource} of this source
+ */
+ StatementStreamSource stream();
+
+
+ /**
+ * Specification of how a {@code module} source should be processed.
+ */
+ record Module(
+ SourceInfo.Module info,
+ StatementStreamSource stream,
+ ImmutableMap<SourceIdentifier, Submodule> submodules,
+ @Nullable ImmutableSet<QName> allowDeviationsFrom,
+ @Nullable ConformanceType conformanceType) implements SourceSpec {
+ public Module {
+ requireNonNull(info);
+ requireNonNull(stream);
+ requireNonNull(submodules);
+ }
+ }
+
+ /**
+ * Specification of how a {@code submodule} source should be processed.
+ */
+ record Submodule(SourceInfo.Submodule info, StatementStreamSource stream) implements SourceSpec {
+ public Submodule {
+ info = requireNonNull(info);
+ stream = requireNonNull(stream);
+ }
+ }
+ }
+}