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+SPDX-License-Identifier: CC-BY-4.0
+
+The tag-value file loader in `package tvloader` makes the following assumptions:
+
+Document Creation Info
+----------------------
+* The Document Creation Info section will always come first, and be completed
+  first. Although the spec may not make this explicit, it appears that this is
+  the intended format. Unless it comes first, the parser will not be able to
+  confirm what version of the SPDX spec is being used. And, "SPDXID:" tags are
+  used for not just the Document Creation Info section but also for others (e.g.
+  Packages, Files).
+
+Relationship
+------------
+* Relationship sections will begin with the "Relationship" tag.
+
+Annotation
+----------
+* Annotation sections will begin with the "Annotator" tag.
+
+Other License Info
+------------------
+* Other License sections will begin with the "LicenseID" tag.
+
+* Any Other License section, if present, will come later than the Document
+  Creation Info section and after any Package, File and Snippet sections.
+
+* Additionally, any Other License section will not have Relationship or
+  Annotation sections.
+
+* An implication of the preceding two points is that the Other License sections
+  should be the final sections in a v2.1 tag-value document, unless it is
+  followed by a (deprecated as of v2.1) Review Information section.
+
+Review
+------
+* Review sections will begin with the "Reviewer" tag.
+
+* Any Review section, if present, will come later than the Document Creation
+  Info section and after any Package, File, Snippet, and Other License sections.
+
+* Additionally, any Review section will not have Relationship or
+  Annotation sections.
+
+* An implication of the preceding two points is that the Review sections
+  should be the final sections in a v2.1 tag-value document.