<custos>

Symbol placed at the end of a line of music to indicate the first note of the next line. Sometimes called a "direct".
2.2.4.2 Bar Lines and Custos Signs
Module
MEI.shared
Attributes
altsym, class, color, copyof, corresp, facs, follows, fontfam, fontname, fontsize, fontstyle, fontweight, glyph.auth, glyph.name, glyph.num, glyph.uri, label, loc, n, next, oct, pname, precedes, prev, resp, sameas, source, synch, target, type, xml:base, xml:id
altsym(optional)Provides a way of pointing to a user-defined symbol. It must contain a reference to an ID of a symbolDef element elsewhere in the document. Value conforms to data.URI.
class(optional)Contains one or more URIs which denote classification terms that apply to the entity bearing this attribute. One or more values from data.URI, separated by spaces.
color(optional)Used to indicate visual appearance. Do not confuse this with the musical term 'color' as used in pre-CMN notation. Value conforms to data.COLOR.
copyof(optional)Points to an element of which the current element is a copy. Value conforms to data.URI.
corresp(optional)Used to point to other elements that correspond to this one in a generic fashion. One or more values from data.URI, separated by spaces.
facs(optional)Permits the current element to reference a facsimile surface or image zone which corresponds to it. One or more values from data.URI, separated by spaces.
follows(optional)points to one or more events in a user-defined collection that are known to be predecessors of the current element. One or more values from data.URI, separated by spaces.
fontfam(optional)Contains the name of a font-family. Value conforms to data.FONTFAMILY.
fontname(optional)Holds the name of a font. Value conforms to data.FONTNAME.
fontsize(optional)Indicates the size of a font expressed in printers' points, i.e., 1/72nd of an inch, relative terms, e.g., "small", "larger", etc., or percentage values relative to "normal" size, e.g., "125%". Value conforms to data.FONTSIZE.
fontstyle(optional)Records the style of a font, i.e, italic, oblique, or normal. Value conforms to data.FONTSTYLE.
fontweight(optional)Used to indicate bold type. Value conforms to data.FONTWEIGHT.
glyph.auth(optional)A name or label associated with the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Allowed values are: "smufl" (Standard Music Font Layout.)
glyph.name(optional)Glyph name. Value of datatype string.
glyph.num(optional)Numeric glyph reference in hexadecimal notation, e.g. "#xE000" or "U+E000". N.B. SMuFL version 1.18 uses the range U+E000 - U+ECBF. Value conforms to data.HEXNUM.
glyph.uri(optional)The web-accessible location of the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Value conforms to data.URI.
label(optional)Captures text to be used to generate a label for the element to which it's attached, a "tool tip" or prefatory text, for example. Should not be used to record document content. Value of datatype string.
loc(optional)Holds the staff location of the feature. Value conforms to data.STAFFLOC.
n(optional)Provides a number-like designation that indicates an element's position in a sequence of similar elements. May not contain space characters. Value conforms to data.WORD.
next(optional)Used to point to the next event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
oct(optional)Captures written octave information. Value conforms to data.OCTAVE.
pname(optional)Contains a written pitch name. Value conforms to data.PITCHNAME.
precedes(optional)Points to one or more events in a user-defined collection that are known to be successors of the current element. One or more values from data.URI, separated by spaces.
prev(optional)Points to the previous event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
resp(optional)Indicates the agent(s) responsible for some aspect of the text's transcription, editing, or encoding. Its value must point to one or more identifiers declared in the document header. One or more values from data.URI, separated by spaces.
sameas(optional)Points to an element that is the same as the current element but is not a literal copy of the current element. One or more values from data.URI, separated by spaces.
source(optional)Contains a list of one or more pointers indicating the sources which attest to a given reading. Each value should correspond to the ID of a source or manifestationelement located in the document header. One or more values from data.URI, separated by spaces.
synch(optional)Points to elements that are synchronous with the current element. One or more values from data.URI, separated by spaces.
target(optional)Encodes the target note when its pitch differs from the pitch at which the custos appears. Value conforms to data.URI.
type(optional)Designation which characterizes the element in some sense, using any convenient classification scheme or typology that employs single-token labels. One or more values of datatype NMTOKEN, separated by spaces.
xml:base(optional)Provides a base URI reference with which applications can resolve relative URI references into absolute URI references. Value conforms to data.URI.
xml:id(optional)Regularizes the naming of an element and thus facilitates building links between it and other resources. Each id attribute within a document must have a unique value. Value of datatype ID.
(MEI.shared) Attributes common to many elements.
(MEI.shared) Attributes that form the basis of the att.common class.
xml:base(optional)Provides a base URI reference with which applications can resolve relative URI references into absolute URI references. Value conforms to data.URI.
(MEI.shared) Attributes that uniquely identify an element.
xml:id(optional)Regularizes the naming of an element and thus facilitates building links between it and other resources. Each id attribute within a document must have a unique value. Value of datatype ID.
(MEI.shared)
label(optional)Captures text to be used to generate a label for the element to which it's attached, a "tool tip" or prefatory text, for example. Should not be used to record document content. Value of datatype string.
(MEI.shared) Attributes that specify element-to-element relationships.
copyof(optional)Points to an element of which the current element is a copy. Value conforms to data.URI.
corresp(optional)Used to point to other elements that correspond to this one in a generic fashion. One or more values from data.URI, separated by spaces.
follows(optional)points to one or more events in a user-defined collection that are known to be predecessors of the current element. One or more values from data.URI, separated by spaces.
next(optional)Used to point to the next event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
precedes(optional)Points to one or more events in a user-defined collection that are known to be successors of the current element. One or more values from data.URI, separated by spaces.
prev(optional)Points to the previous event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
sameas(optional)Points to an element that is the same as the current element but is not a literal copy of the current element. One or more values from data.URI, separated by spaces.
synch(optional)Points to elements that are synchronous with the current element. One or more values from data.URI, separated by spaces.
(MEI.shared) Attributes used to supply a number-like designation for an element.
n(optional)Provides a number-like designation that indicates an element's position in a sequence of similar elements. May not contain space characters. Value conforms to data.WORD.
(MEI.shared) Attributes capturing information regarding responsibility for some aspect of the text's creation, transcription, editing, or encoding.
resp(optional)Indicates the agent(s) responsible for some aspect of the text's transcription, editing, or encoding. Its value must point to one or more identifiers declared in the document header. One or more values from data.URI, separated by spaces.
(MEI.shared) Attributes which can be used to classify features.
type(optional)Designation which characterizes the element in some sense, using any convenient classification scheme or typology that employs single-token labels. One or more values of datatype NMTOKEN, separated by spaces.
(MEI.shared) Attributes which can be used to classify features.
class(optional)Contains one or more URIs which denote classification terms that apply to the entity bearing this attribute. One or more values from data.URI, separated by spaces.
(MEI.facsimile) Attributes that associate a feature corresponding with all or part of an image.
facs(optional)Permits the current element to reference a facsimile surface or image zone which corresponds to it. One or more values from data.URI, separated by spaces.
(MEI.shared) Attributes common to elements that may refer to a source.
source(optional)Contains a list of one or more pointers indicating the sources which attest to a given reading. Each value should correspond to the ID of a source or manifestationelement located in the document header. One or more values from data.URI, separated by spaces.
(MEI.shared) Logical domain attributes.
target(optional)Encodes the target note when its pitch differs from the pitch at which the custos appears. Value conforms to data.URI.
(MEI.shared) Attributes that record written pitch name and octave number.
(MEI.shared) Attributes that record written pitch name.
pname(optional)Contains a written pitch name. Value conforms to data.PITCHNAME.
(MEI.shared) Attributes that record written octave.
oct(optional)Captures written octave information. Value conforms to data.OCTAVE.
(MEI.visual) Visual domain attributes.
(MEI.usersymbols) Attributes supplying pointers to user-defined symbols.
altsym(optional)Provides a way of pointing to a user-defined symbol. It must contain a reference to an ID of a symbolDef element elsewhere in the document. Value conforms to data.URI.
(MEI.shared) Visual color attributes.
color(optional)Used to indicate visual appearance. Do not confuse this with the musical term 'color' as used in pre-CMN notation. Value conforms to data.COLOR.
(MEI.externalsymbols) Attributes used to associate MEI features with corresponding glyphs in an externally-defined standard such as SMuFL.
glyph.auth(optional)A name or label associated with the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Allowed values are: "smufl" (Standard Music Font Layout.)
glyph.name(optional)Glyph name. Value of datatype string.
glyph.num(optional)Numeric glyph reference in hexadecimal notation, e.g. "#xE000" or "U+E000". N.B. SMuFL version 1.18 uses the range U+E000 - U+ECBF. Value conforms to data.HEXNUM.
glyph.uri(optional)The web-accessible location of the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Value conforms to data.URI.
(MEI.shared) Attributes that identify location on a staff in terms of lines and spaces.
loc(optional)Holds the staff location of the feature. Value conforms to data.STAFFLOC.
(MEI.shared) Typographical attributes.
fontfam(optional)Contains the name of a font-family. Value conforms to data.FONTFAMILY.
fontname(optional)Holds the name of a font. Value conforms to data.FONTNAME.
fontsize(optional)Indicates the size of a font expressed in printers' points, i.e., 1/72nd of an inch, relative terms, e.g., "small", "larger", etc., or percentage values relative to "normal" size, e.g., "125%". Value conforms to data.FONTSIZE.
fontstyle(optional)Records the style of a font, i.e, italic, oblique, or normal. Value conforms to data.FONTSTYLE.
fontweight(optional)Used to indicate bold type. Value conforms to data.FONTWEIGHT.
(MEI.gestural) Gestural domain attributes.
(MEI.analytical) Analytical domain attributes.
External symbols component declarations.
glyph.auth(optional)A name or label associated with the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Allowed values are: "smufl" (Standard Music Font Layout.)
glyph.name(optional)Glyph name. Value of datatype string.
glyph.num(optional)Numeric glyph reference in hexadecimal notation, e.g. "#xE000" or "U+E000". N.B. SMuFL version 1.18 uses the range U+E000 - U+ECBF. Value conforms to data.HEXNUM.
glyph.uri(optional)The web-accessible location of the controlled vocabulary from which the value of glyph.name or glyph.num is taken. Value conforms to data.URI.
Facsimile component declarations.
facs(optional)Permits the current element to reference a facsimile surface or image zone which corresponds to it. One or more values from data.URI, separated by spaces.
Component declarations that are shared between two or more modules.
class(optional)Contains one or more URIs which denote classification terms that apply to the entity bearing this attribute. One or more values from data.URI, separated by spaces.
color(optional)Used to indicate visual appearance. Do not confuse this with the musical term 'color' as used in pre-CMN notation. Value conforms to data.COLOR.
copyof(optional)Points to an element of which the current element is a copy. Value conforms to data.URI.
corresp(optional)Used to point to other elements that correspond to this one in a generic fashion. One or more values from data.URI, separated by spaces.
follows(optional)points to one or more events in a user-defined collection that are known to be predecessors of the current element. One or more values from data.URI, separated by spaces.
fontfam(optional)Contains the name of a font-family. Value conforms to data.FONTFAMILY.
fontname(optional)Holds the name of a font. Value conforms to data.FONTNAME.
fontsize(optional)Indicates the size of a font expressed in printers' points, i.e., 1/72nd of an inch, relative terms, e.g., "small", "larger", etc., or percentage values relative to "normal" size, e.g., "125%". Value conforms to data.FONTSIZE.
fontstyle(optional)Records the style of a font, i.e, italic, oblique, or normal. Value conforms to data.FONTSTYLE.
fontweight(optional)Used to indicate bold type. Value conforms to data.FONTWEIGHT.
label(optional)Captures text to be used to generate a label for the element to which it's attached, a "tool tip" or prefatory text, for example. Should not be used to record document content. Value of datatype string.
loc(optional)Holds the staff location of the feature. Value conforms to data.STAFFLOC.
n(optional)Provides a number-like designation that indicates an element's position in a sequence of similar elements. May not contain space characters. Value conforms to data.WORD.
next(optional)Used to point to the next event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
oct(optional)Captures written octave information. Value conforms to data.OCTAVE.
pname(optional)Contains a written pitch name. Value conforms to data.PITCHNAME.
precedes(optional)Points to one or more events in a user-defined collection that are known to be successors of the current element. One or more values from data.URI, separated by spaces.
prev(optional)Points to the previous event(s) in a user-defined collection. One or more values from data.URI, separated by spaces.
resp(optional)Indicates the agent(s) responsible for some aspect of the text's transcription, editing, or encoding. Its value must point to one or more identifiers declared in the document header. One or more values from data.URI, separated by spaces.
sameas(optional)Points to an element that is the same as the current element but is not a literal copy of the current element. One or more values from data.URI, separated by spaces.
source(optional)Contains a list of one or more pointers indicating the sources which attest to a given reading. Each value should correspond to the ID of a source or manifestationelement located in the document header. One or more values from data.URI, separated by spaces.
synch(optional)Points to elements that are synchronous with the current element. One or more values from data.URI, separated by spaces.
target(optional)Encodes the target note when its pitch differs from the pitch at which the custos appears. Value conforms to data.URI.
type(optional)Designation which characterizes the element in some sense, using any convenient classification scheme or typology that employs single-token labels. One or more values of datatype NMTOKEN, separated by spaces.
xml:base(optional)Provides a base URI reference with which applications can resolve relative URI references into absolute URI references. Value conforms to data.URI.
xml:id(optional)Regularizes the naming of an element and thus facilitates building links between it and other resources. Each id attribute within a document must have a unique value. Value of datatype ID.
User-defined symbols component declarations.
altsym(optional)Provides a way of pointing to a user-defined symbol. It must contain a reference to an ID of a symbolDef element elsewhere in the document. Value conforms to data.URI.
Member of
model.eventLikeGroups event elements that occur in all notational repertoires.
Contained by
sb(system beginning) – An empty formatting element that forces musical notation to begin on a new line.
(MEI.shared) Groups event elements that occur in all notational repertoires.
beamA container for a series of explicitly beamed events that begins and ends entirely within a measure.
graceGrpA container for a sequence of grace notes.
ligatureA mensural notation symbol that combines two or more notes into a single sign.
tupletA group of notes with "irregular" (sometimes called "irrational") rhythmic values, for example, three notes in the time normally occupied by two or nine in the time of five.
(MEI.neumes) Groups elements that may appear as part of the content of a syllable.
syllableNeume notation can be thought of as "neumed text". Therefore, the syllable element provides high-level organization in this repertoire.
(MEI.shared) Groups notated events that may appear at the layer level in all repertoires.
abbr(abbreviation) – A generic element for 1) a shortened form of a word, including an acronym or 2) a shorthand notation.
add(addition) – Marks an addition to the text.
corr(correction) – Contains the correct form of an apparent erroneous passage.
damageContains an area of damage to the physical medium.
del(deletion) – Contains information deleted, marked as deleted, or otherwise indicated as superfluous or spurious in the copy text by an author, scribe, annotator, or corrector.
expan(expansion) – Contains the expansion of an abbreviation.
layerAn independent stream of events on a staff.
lem(lemma) – Contains the lemma, or base text, of a textual variation.
oLayer(ossia layer) – A layer that contains an alternative to material in another layer.
orig(original) – Contains material which is marked as following the original, rather than being normalized or corrected.
rdg(reading) – Contains a single reading within a textual variation.
reg(regularization) – Contains material which has been regularized or normalized in some sense.
restoreIndicates restoration of material to an earlier state by cancellation of an editorial or authorial marking or instruction.
sicContains apparently incorrect or inaccurate material.
suppliedContains material supplied by the transcriber or editor for any reason.
unclearContains material that cannot be transcribed with certainty because it is illegible or inaudible in the source.
Common Music Notation (CMN) repertoire component declarations.
beamA container for a series of explicitly beamed events that begins and ends entirely within a measure.
graceGrpA container for a sequence of grace notes.
oLayer(ossia layer) – A layer that contains an alternative to material in another layer.
tupletA group of notes with "irregular" (sometimes called "irrational") rhythmic values, for example, three notes in the time normally occupied by two or nine in the time of five.
Critical apparatus component declarations.
lem(lemma) – Contains the lemma, or base text, of a textual variation.
rdg(reading) – Contains a single reading within a textual variation.
Editorial and transcriptional component declarations.
abbr(abbreviation) – A generic element for 1) a shortened form of a word, including an acronym or 2) a shorthand notation.
add(addition) – Marks an addition to the text.
corr(correction) – Contains the correct form of an apparent erroneous passage.
damageContains an area of damage to the physical medium.
del(deletion) – Contains information deleted, marked as deleted, or otherwise indicated as superfluous or spurious in the copy text by an author, scribe, annotator, or corrector.
expan(expansion) – Contains the expansion of an abbreviation.
orig(original) – Contains material which is marked as following the original, rather than being normalized or corrected.
reg(regularization) – Contains material which has been regularized or normalized in some sense.
restoreIndicates restoration of material to an earlier state by cancellation of an editorial or authorial marking or instruction.
sicContains apparently incorrect or inaccurate material.
suppliedContains material supplied by the transcriber or editor for any reason.
unclearContains material that cannot be transcribed with certainty because it is illegible or inaudible in the source.
Mensural repertoire component declarations.
ligatureA mensural notation symbol that combines two or more notes into a single sign.
Neume repertoire component declarations.
syllableNeume notation can be thought of as "neumed text". Therefore, the syllable element provides high-level organization in this repertoire.
Component declarations that are shared between two or more modules.
layerAn independent stream of events on a staff.
sb(system beginning) – An empty formatting element that forces musical notation to begin on a new line.
May Contain
– (<custos> may not have child elements)
Remarks

The most common visual form is a sign resembling a mordent. Other graphical forms may be indicated by the altsym attribute. Together the pname and oct attributes identify the location where the custos appears.

Declaration
<elementSpec ident="custos" module="MEI.shared">
<desc>Symbol placed at the end of a line of music to indicate the first note of the next line. Sometimes called a "direct".</desc>
<classes>
<memberOf key="att.common"/>
<memberOf key="att.facsimile"/>
<memberOf key="att.source"/>
<memberOf key="att.custos.log"/>
<memberOf key="att.custos.vis"/>
<memberOf key="att.custos.ges"/>
<memberOf key="att.custos.anl"/>
<memberOf key="model.eventLike"/>
</classes>
<content>
<rng:empty/>
</content>
<remarks>
<p part="N">The most common visual form is a sign resembling a mordent. Other graphical forms may be indicated by the
<att scheme="TEI">altsym</att>
attribute. Together the
<att scheme="TEI">pname</att>
and
<att scheme="TEI">oct</att>
attributes identify the location where the custos appears.</p>
</remarks>
</elementSpec>