ChordQL

Example I is a simple sequence of chords, represented as c elements:

<query>
  <c r="G"/><c r="D" b="F#"/><c r="G"/><c r="E" s="7"/><c r="A" s="7"/><c r="D"/>
</query>

matches a music with this fragment:

<c r="G"/>Eu me arrependo, Senhor<c r="D" b="F#"/>,

Me arrependo Senhor<c r="G"/>, me arre<c r="E" s="7"/>pendo, Se<c r="A" s="7"/>nhor

<begin-repeat/>Eu <c r="D"/>quero voltar ao prime<c r="A" b="C#"/>iro  <c r="B" s="m"/>amor <c r="A" s="7"/>

Example II disregards chord inversions and checks only if the chord suffix is in major or minor mode:

<query consider-inversions="no" suffix="major-minor">
  <c r="G"/><c r="D"/><c r="G"/><c r="E"/><c r="A"/><c r="D"/>
</query>

matches a music with this fragment:

<c r="G"/>Eu me arrependo, Senhor<c r="D" b="F#"/>,

Me arrependo Senhor<c r="G"/>, me arre<c r="E" s="7"/>pendo, Se<c r="A" s="7"/>nhor

Here are some matrix showing different results for different attributes of the query element. Lines represent query arguments, and columns represent chords that exist in the music.

(consider the music in the key of G)

*default attributes in the query* element (suffix="exact", grades="no", consider-inversions="yes")**

	music contains
	<c r="G">	<c r="E" s="m7"/>
query argument
<c r="G"/>	match	no-match
<c r="E" s="m"/>	no-match	no-match
<c r="G" b="B"/>	no-match	no-match
<c r="Fb" s="m7"/>	no-match	no-match

*suffix="major-minor" in the query* element**
	music contains
	<c r="G">	<c r="E" s="m7"/>
query argument
<c r="G"/>	match	no-match
<c r="E" s="m"/>	no-match	match
<c r="G" b="B"/>	no-match	no-match
<c r="G" s="m"/>	no-match	no-match

*grades="yes" in the query* element**
	music contains
	<c r="G">	<c r="A" s="m"/>	<c r="G" b="B">
query argument
<c r="I"/>	match	no-match	no-match
<c r="ii"/>	no-match	match	no-match
<c r="I" i="64"/>	no-match	no-match	no-match
<c r="I" i="6"/>	no-match	no-match	match

*consider-inversions="no" in the query* element**
	music contains
	<c r="G">	<c r="G" b="B">	<c r="G" s="m">
query argument
<c r="G"/>	match	match	no-match
<c r="G" b="B">	match	match	no-match

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