/ [ ] @*[local-name()='schema' and namespace-uri()='http://purl.oclc.org/dsdl/schematron'] . permissions-errors permissions-errors permissions-warnings permissions-warnings math-errors math-errors math-warnings math-warnings data-citations-errors data-citations-errors data-citations-warnings data-citations-warnings ERROR: Missing top-level <permissions> element. JATS4R-compliant articles must include a <permissions> element within <article-meta>.. (See https://jats4r.org/permissions, Recommendation 1.) ERROR: Missing <copyright-year>. When an article is under copyright (i.e. it is not in the public domain) a <copyright-year> must be given. (See https://jats4r.org/permissions, Recommendation 3.) ERROR: Missing <copyright-holder>. When an article is under copyright (i.e. it is not in the public domain) a <copyright-holder> must be given. ERROR: <copyright-year> must be a 4-digit year, not " ". ERROR: <copyright-year> should not contain whitespace. ERROR: If both @xlink:href and <ali:license_ref> are used to specify the licence URI of an article, their contents must match exactly. WARNING: Whenever the @xlink:href attribute appears on the <license> element, its value must be the canonical URI of a valid license (such as a Creative Commons license). In this article, the attribute is empty. WARNING: Whenever the ali:license_ref element appears, its content must be the canonical URI of a valid license (such as a Creative Commons license). In this article, the element is empty. WARNING: No licence URI. For JATS 1.1d3 and later, if the licence is defined by a canonical URI, then the <license> element should have an <ali:license_ref> child, that specifies that URI. WARNING: The license URI is given in @xlink:href. For JATS 1.1d3 and later, if the licence is defined by a canonical URI, then it should be specified in the <ali:license_ref> child element. WARNING: No licence URI. For JATS 1.1d2 and earlier, if the licence is defined by a canonical URI, then the <license> element should have an @xlink:href attribute, that specifies that URI. ERROR: Math expressions must be in <disp-formula> or <inline-formula> elements. They should not appear directly in < >. ERROR: Formula element should contain only one expression. If these are alternate representations of the same expression, use <alternatives>. If they are different expressions, tag each in its own < >. ERROR: For alternate representations of the same expression, there can be at most one of each type of representation (graphic or inline-graphic, tex-math, and mml:math). WARNING: All mathematical expressions should be provided in markup using either <mml:math> or <tex-math>. The only instance in which the graphic representation of a mathematical expression should be used outside of <alternatives> and without the equivalent markup is where that expression is so complicated that it cannot be represented in markup at all. ERROR: When <data-title> element is present, the @citation-type must be set to "data". ERROR: <data-title> and/or <source> must be present in data citations. ERROR: <data-title> must be used in data citations, not <article-title>. ERROR: <year> in a citation must be a valid 4-digit year. " " was supplied ERROR: <version> must include a machine-readable version number in the @designator.