"" contains a deprecated value. "" contains a deprecated value. Other values not permitted when 'above', 'below', 'between' or 'within' is present. The @staff attribute must contain 2 numerically-adjacent integer values. Staves and are not adjacent. An element with a notationsubtype attribute must have a notationtype attribute. Stem directions should be specified for all notes and chords under the beam. Opposing stem directions are required for a beam with @place="mixed". Opposing stem directions are required for a beam with @place="mixed". Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. A beam that contains neither a copyof nor sameas attribute must have at least 2 note, rest, chord, or space descendants. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. A graceGrp without a copyof attribute must have at least 1 note, rest, chord, or space descendants. The grace attribute is not allowed on descendants of a graceGrp with a grace attribute. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. The visual attributes of the lv element (@bezier, @bulge, @curvedir, @lform, @lwidth, @ho, @startho, @endho, @to, @startto, @endto, @vo, @startvo, @endvo, @x, @y, @x2, and @y2) will be overridden by visual attributes of the contained curve elements. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. In a measure, ossia may only contain staff and oStaff elements. In a staff, ossia may only contain layer and oLayer elements. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. The visual attributes of the slur (@bezier, @bulge, @curvedir, @lform, @lwidth, @ho, @startho, @endho, @to, @startto, @endto, @vo, @startvo, @endvo, @x, @y, @x2, and @y2) will be overridden by visual attributes of the contained curve elements. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. The visual attributes of the tie (@bezier, @bulge, @curvedir, @lform, @lwidth, @ho, @startho, @endho, @to, @startto, @endto, @vo, @startvo, @endvo, @x, @y, @x2, and @y2) will be overridden by visual attributes of the contained curve elements. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must not have any of the attributes: startid, endid, tstamp, tstamp2, tstamp.ges, tstamp.real, startho, endho, to, startto, endto, staff, layer, place, or plist. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must not have any of the attributes: startid, endid, tstamp, tstamp2, tstamp.ges, tstamp.real, startho, endho, to, startto, endto, staff, layer, place, or plist. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real Must have one of the attributes: dur, dur.ges, endid, or tstamp2 @new attribute should have content. The value in @new should correspond to the @xml:id attribute of a hand element. @old attribute should have content. The value in @old should correspond to the @xml:id attribute of a hand element. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real @glyph.name attribute should have content. SMuFL version 1.18 uses the range U+E000 - U+ECBF. @facs attribute should have content. Each value in @facs should correspond to the @xml:id attribute of a surface or zone element. Graphic child of zone should not have children. Graphic should have either a startid attribute or ulx and uly attributes. Graphic should not have @ulx or @uly attributes. Graphic should not have @ho or @vo attributes. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. The stack element is not allowed as a descendant of fing. At least 2 fing or fingGrp elements are required. When @tstamp or @startid is present on fingGrp, its child elements cannot have a @tstamp or @startid attribute. When @tstamp or @startid is not present on fingGrp, each of its child elements must have a @tstamp or @startid attribute. Item children are not permitted when @singleton equals "true". Availability is only permitted when @singleton equals "true". @state attribute should have content. The value in @state should correspond to the @xml:id attribute of a genState (genetic state) element. The value of @accid.ges should not duplicate the value of @accid. When the @extremis attribute is used, the @pname.ges and @oct.ges attributes are not allowed. @chordref attribute should have content. The value in @chordref should correspond to the @xml:id attribute of a chordDef element. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. @context attribute should contain an XPath expression. To be addressable, the category element must have an xml:id attribute. The date of the change must be recorded in an isodate attribute or date element. It is recommended that the agent responsible for the change be recorded in a resp attribute or in a name, corpName, or persName element in the respStmt element. Only child elements of the same name as the parent of the componentList are allowed. When any child element has a comptype attribute, it is recommended that comptype appear on all child elements. When labels are used, usually each content item has one. When labels are used, usually each hand has one. The elements acquisition, provenance, exhibHist, treatHist and treatSched are not permitted at the work or expression level and are only permitted at the manifestation level, if the manifestation is a manifestation singleton. incipCode must have a form or mimetype attribute. The meiHead type attribute can have the value 'music' only when the document element is "mei". The meiHead type attribute can have the value 'corpus' only when the document element is "meiCorpus". The meiHead type attribute can have the value 'independent' only when the document element is "meiHead". The allowed positions of a patch depend on its parent element. A patch element must contain either a folium or a bifolium element. @target attribute should have content. Each value in @target should correspond to the @xml:id attribute of a source or manifestation element or be an external URI. @context attribute should contain an XPath expression. When labels are used, usually each term has one. Duplex quality can only be used with longas (in Ars antiqua). Maior / minor quality can only be used with semibreves (in Ars antiqua). When the @divisio attribute is used, the @tempus and @prolatio attributes are not allowed. Only one plica is allowed. A note with nested stem elements must not have @stem.* attributes. @instr attribute should have content. The value in @instr should correspond to the @xml:id attribute of an instrDef element. Only one of @midi.instrname and @midi.instrnum allowed. Only one of @midi.patchname and @midi.patchnum allowed. The comptype attribute may occur on only when it is a descendant of a componentList. The catchwords element may only appear as a descendant of the physDesc element. The locusGrp element may only appear as a descendant of a physDesc element, a contentItem element, or a source element that is a component of another source or work. The secFolio element may only appear as a descendant of the physDesc element. The signatures element may only appear as a descendant of the physDesc element. @when attribute should have content. A value in @when should correspond to the @xml:id attribute of a when element. An avFile child of clip cannot have children. When @begin or @end is used, @betype should appear on clip or one of its ancestors. A recording must name its take in @source, so that a document holding several takes can say which one a when belongs to. The @source of a recording must be a reference of the form '#id' resolving to an element of this document, usually a manifestation. Two recordings carry the same @source, so neither can be selected by it. When @begin or @end is used, @betype should be present. A match names the written note in @data. A match names the moment it sounded in @absolute. A deletion names the written note in @data. A deletion has no @absolute, because the note was never played. An insertion has no @data, because there is no written note for it to point at. An insertion names the moment it sounded in @absolute. An insertion carries the pitch that sounded in extData of type 'pitch', since the score does not give it. A substitution names the written note in @data. A substitution names the moment it sounded in @absolute. A substitution carries the pitch that sounded in extData of type 'pitch', which is what makes it a substitution rather than a match. A pedal event has no @data, because it realises no written note. A pedal event names in @absolute the moment it was pressed, or, where it carries its travel, the moment it left rest. The @data of a when must be a reference of the form '#id' resolving to an element of this document. The @absolute of a when is written in whole milliseconds with the 'ms' unit. Other forms MEI allows are read differently by the two readers this format serves. A when carrying @absolute states @abstype='smil'; the verovio fork warns on any other value. An ornamentAnchorConfidence is written together with an ornamentAnchorConfidenceOf naming which quantity it holds. An unlabelled number cannot be compared across files. The ornament fields describe an anchor, so they require an ornamentAnchor to describe. @since must be present when @interval is used. The value in @since should correspond to the @xml:id attribute of a when element. When @interval contains an integer value, @inttype cannot be 'time'. When @interval contains a time value, @inttype must be 'time'. When @absolute is present, @abstype should be present or @betype should be present on an ancestor. @since attribute should have content. The value in @since should correspond to the @xml:id attribute of a when element. @since attribute should have content. The value in @since should correspond to the @xml:id attribute of a when element. @target attribute should have content. The value in @target should correspond to the @xml:id attribute of a section or mdiv element. An element with a dots attribute must also have a dur attribute. "mensur" not allowed in this context. The value in @class must either correspond to the @xml:id attribute of a category element or be an external URL. An 'F', 'C', or 'G' clef requires that its position be specified. A TAB or percussion clef requires that the number of lines be specified. When @shape is present, @line must also be specified. @target attribute should have content. The value in @target should correspond to the @xml:id attribute of a note element. @data attribute should have content. The value in @data should correspond to the @xml:id attribute of a descendant of the music element. @decls attribute should have content. Each value in @decls should correspond to the @xml:id attribute of an element within the metadata header. No value in @decls should correspond to the @xml:id attribute of a classification term. Use @class for this purpose. The @unit attribute is recommended. Separation into value (@extent) and unit (@unit) is recommended. @hand attribute should have content. Each value in @hand should correspond to the @xml:id attribute of a hand element. @join attribute should have content. Each value in @join should correspond to the @xml:id attribute of an element. @def attribute should have content. The value in @def should correspond to the @xml:id attribute of a layerDef element. @lform attribute matching "dashed", "dotted", or "wavy" required. An element with a copyof attribute can only have comment or processing instruction descendents. @copyof attribute should have content. The value in @copyof should correspond to the @xml:id attribute of an element. @corresp attribute should have content. Each value in @corresp should correspond to the @xml:id attribute of an element. @follows attribute should have content. Each value in @follows must correspond to the @xml:id attribute of an element. @next attribute should have content. Each value in @next should correspond to the @xml:id attribute of an element. @precedes attribute should have content. Each value in @precedes must correspond to the @xml:id attribute of an element. @prev attribute should have content. Each value in @prev should correspond to the @xml:id attribute of an element. @sameas attribute should have content. Each value in @sameas should correspond to the @xml:id attribute of an element. @synch attribute should have content. Each value in @synch should correspond to the @xml:id attribute of an element. The @meiversion attribute is not allowed on elements that are not the document root element. @nymref attribute should have content. The value in @nymref should correspond to the @xml:id attribute of an element. @head.altsym attribute should have content. The value in @head.altsym should correspond to the @xml:id attribute of a symbolDef element. When @head.auth matches 'smufl', @head.shape must contain a numeric glyph reference in hexadecimal notation, like "#xE000" or "U+E000". SMuFL version 1.18 uses the range U+E000 - U+ECBF. When @origin.tstamp2 is used @origin.tstamp must also be present. '%all' cannot be mixed with other values. '%all' cannot be mixed with other values. @plist attribute should have content. Each value in @plist should correspond to the @xml:id attribute of an element. The attributes @min and @max are required when @confidence is present. @resp attribute should have content. The value in @resp should correspond to the @xml:id attribute of an element within the metadata header. @source attribute should have content. Each value in @source should correspond to the @xml:id attribute of a source or manifestation element. @def attribute should have content. The value in @def should correspond to the @xml:id attribute of a staffDef element. @endid attribute should have content. The value in @endid should correspond to the @xml:id attribute of an element. @startid attribute should have content. The value in @startid should correspond to the @xml:id attribute of an element. @stem.sameas attribute should have content. The value in @stem.sameas should correspond to the @xml:id attribute of the linked note element of a different layer. The linked notes by @stem.sameas should have the same @dur values. The @data attribute may only occur on an annotation within the notesStmt element. When labels are used, usually each bibliographic item has one. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Column beginning must be preceded by a colLayout element. The value of @n should be less than or equal to the value of @cols () of the preceding colLayout element. The clef position must be less than or equal to the number of lines of an ancestor staff. The clef position must be less than or equal to the number of lines of a preceding staff. The value of @role must not contain the name of another element available in this context. The dedicatee element may not be recursively nested. The depth element may only appear once. The height element may only appear once. The width element may only appear once. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. When @val2 is present, either @dur, @dur.ges, @endid, or @tstamp2 must also be present. A velocity or a pitch is a whole number from 0 to 127. A duration is written in whole milliseconds with the 'ms' unit, for the reason given for @absolute. A tick count and an ornament slot are whole numbers. A confidence is a number from 0 to 1. An ornamentAnchor is a reference of the form '#id' resolving to an element of this document. A travel belongs to a pedal event; a note has none. A travel is a list of pairs 'ms:position' separated by whitespace: the milliseconds whole and counted from @absolute, the position from 0 (up) to 1 (down). The pairs of a travel ascend in time. An ornamentAnchorFrom says whether the model named the anchor ('model'), whether an ornament sign in the score settled a ranking the model was unsure of ('model-and-sign'), or whether it was guessed from the timing ('timing'). In scoreDef, grpSym must have startid, endid, and level attributes. In staffGrp, grpSym must not have startid, endid, or level attributes. One of the following is required: @x and @y attribute pair, @pname attribute, or @loc attribute. If the @oct attribute appears on any keyAccid element, it must be provided on all keyAccid elements. Only keyAccid elements are allowed here. The values in @staff must correspond to @n attribute of a staffDef element. An as-played-by document records at least one performance, so its music holds a performance with a recording in it. Recommended practice is to use name elements to capture sub-parts of a generic name. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. Must have one of the attributes: dur, dur.ges, endid, or tstamp2. The visual attributes of the phrase (@bezier, @bulge, @curvedir, @lform, @lwidth, @ho, @startho, @endho, @to, @startto, @endto, @vo, @startvo, @endvo, @x, @y, @x2, and @y2) will be overridden by visual attributes of the contained curve elements. Within work, expression, source, or item, the value of the rel attribute must match one of the following: hasAbridgement, isAbridgementOf, hasAdaptation, isAdaptationOf, hasAlternate, isAlternateOf, hasArrangement, isArrangementOf, hasComplement, isComplementOf, hasEmbodiment, isEmbodimentOf, hasExemplar, isExemplarOf, hasImitation, isImitationOf, hasPart, isPartOf, hasRealization, isRealizationOf, hasReconfiguration, isReconfigurationOf, hasReproduction, isReproductionOf, hasRevision, isRevisionOf, hasSuccessor, isSuccessorOf, hasSummarization, isSummarizationOf, hasSupplement, isSupplementOf, hasTransformation, isTransformationOf, hasTranslation, isTranslationOf Within work, expression, source or item, the target attribute must be present. At least one element pair (a resp element and a name-like element) is recommended. Alternatively, each name-like element may have a @role attribute. The value of @line must be less than or equal to the number of lines on the staff. A section containing an expansion element must have descendant section, ending, or rdg elements. There must be a preceding staffDef with a matching value of @n, a preceding staff with a matching @n value containing a staffDef, or a staffDef child element. StaffDef must have an n attribute. Either @lines must be present or a preceding staffDef with the same value for @n and @lines must exist. Only one clef or clefGrp is permitted. @n must have the same value as the current staff. Either @lines must be present or a preceding staffDef with matching @n value and @lines must exist. The clef position must be less than or equal to the number of lines on the staff. The clef position must be less than or equal to the number of lines on the staff. The tab.strings attribute must have the same number of values as there are staff lines. The tab.strings attribute must have the same number of values as there are staff lines. The lines.color attribute must have either 1) a single value or 2) the same number of values as there are staff lines. The lines.color attribute must have either 1) a single value or 2) the same number of values as there are staff lines. The value of ppq must be a factor of the value of ppq on an ancestor scoreDef. The value of ppq must be a factor of the value of ppq on a preceding scoreDef. Each staffDef must have a unique value for the n attribute. In the symbolDef context, symbol must have either a startid attribute or x and y attributes. In the symbolDef context, symbol must have one of the following attributes: altsym, glyph.name, or glyph.num. Only analog, class, label, mm, mm.dots, mm.unit, n, translit, type, xml:base, xml:id, and xml:lang attributes are allowed when tempo is not a descendant of a score or part. Must have one of the attributes: startid, tstamp, tstamp.ges or tstamp.real. The @data attribute may only occur on a term which is a descendant of a classification element. In a list of type "gloss" all items must be immediately preceded by a label. @altsym attribute should have content. The value in @altsym should correspond to the @xml:id attribute of a symbolDef element. The value in @altsym must not correspond to the @xml:id attribute of a symbolDef ancestor. In the symbolDef context, curve must have either a startid attribute or x and y attributes. In the symbolDef context, curve must have either an endid attribute or both x2 and y2 attributes. In the symbolDef context, curve must have either a bezier or bulge attribute. When used in the symbolDef context, must have either a startid attribute or x and y attributes. When used in the symbolDef context, must have either an endid attribute or both x2 and y2 attributes. When used in the score context, must have a startid, tstamp, tstamp.ges or tstamp.real attribute or both x and y attributes. When used in the score context, must have an endid, dur, dur.ges, or tstamp2 attribute or both x2 and y2 attributes. The number of floating beams must be less than or equal to the total number of beams.